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MANUFACTURING PROCESSES Dot Peen Marking Dot Peen Marking is a precise, high-speed method used to permanently mark metal components, making it highly suitable for engineered fasteners and critical components. Unlike traditional die stamping, Dot Peen marking creates indented or raised patterns by a controlled pin that strikes the surface, allowing for flexible, durable, and high-contrast markings directly on the part. The Dot Peen Marking Process: Dot Peen Marking uses a computer-controlled stylus to indent the metal surface with a series of dots, forming characters, logos, or traceability codes. Key steps include: 1. Material Preparation: Components such as bolts, screws, washers, or brackets (commonly steel, stainless steel, aluminum, or brass) are cleaned and positioned for marking. 2. Tooling Setup: The Dot Peen marking system is programmed with the desired text, symbols, or codes. The marking stylus is aligned to the exact location on the component. 3. Marking Operations: The stylus creates a series of dots on the metal surface, forming permanent marks. Marking types include: Part Numbers & Serial Codes: Ensures traceability and inventory tracking. Logos & Branding: Adds company or product identifiers directly on the fastener. Specifications: Marks material grade, size, or compliance information. 4. Final Processing: After marking, components may undergo secondary processes such as deburring, coating, or inspection to meet quality standards. Enhancements in Dot Peen Technology: CNC Integration: Automated positioning allows precise placement on small or irregular components. High-Speed Marking: Modern systems achieve faster cycle times for large production runs. Flexible Materials: Can mark a wide range of metals, including hardened or coated surfaces. Automation: Robotic handling systems improve consistency, reduce labor, and integrate with production lines. Advantages of Dot Peen Marking: Permanent Identification: Marks are durable and resistant to wear, corrosion, and heat. Precision & Clarity: High-resolution marking ensures legible, repeatable results. Versatility: Can mark flat, curved, or irregular surfaces without additional tooling. Cost Efficiency: Eliminates the need for custom dies for each mark, reducing setup costs. Traceability & Compliance: Supports industry standards for part identification and quality control. Applications in Engineered Fasteners: Dot Peen Marking is widely used for marking critical components where traceability, compliance, and branding are essential. Applications include: Flat Fasteners: Washers, clips, and retaining rings marked with part numbers or logos. Threaded Fasteners: Bolts, screws, and studs marked before or after threading for identification. Custom Components: Brackets, flanges, or assemblies requiring specification or serial numbers. Traceability Marks: Batch numbers, heat codes, or certification information for quality assurance. Structural Components: Reinforcements and subassemblies marked for installation or inspection purposes. Limitations Surface Depth Restrictions: Extremely thin or soft materials may not retain deep marks. Speed vs. Complexity: Highly detailed marks may require slower marking speeds. Cold Heading Hot Heading EDM Milling Turning Swiss Machining Drilling Roll Threading Cut Threading Broaching Heat Treatment Austenitizing Tempering Normalizing Stress Relieving Grinding Polishing Dot Peen Marking Laser Marking MANUFACTURING Explore our manufacturing capabilities OUR PRODUCTS Explore our products Specialty Engineered Fasteners Learn more about our Engineered Fasteners, precision-crafted for specialized and critical applications in diverse industries. Machined Parts Learn more about our custom-designed Machined Components expertly crafted for applications across a range of industries. Precision Shear Products Explore our shear product manufacturing and quality capabilities, delivering precision solutions for the most demanding applications. DOING WHATEVER IT TAKES Need product help or engineering support? Contact our team of fastener experts today CONTACT

MANUFACTURING PROCESSES Cut Threading Cut threading is a traditional method used to create threads on engineered fasteners and components. It involves physically removing material from a blank to form the thread’s shape. This process is highly precise and is particularly suitable for custom or low-volume production of threaded components. The Cut Threading Process: 1. Preparation: A cylindrical blank or fastener body is prepared, typically made of materials like steel, stainless steel, titanium, or other alloys. The blank is secured in a lathe, threading machine, or CNC machine. 2. Thread Cutting Tool: A specialized cutting tool or die is used to remove material from the blank, creating the helical grooves that form the threads. The tool’s shape corresponds to the desired thread profile (e.g., triangular for standard threads, square for certain industrial applications). 3. Threading Operation: Single-Point Cutting: For larger threads or precision applications, a single-point tool is used to cut the thread profile in successive passes. Thread Chasing: Involves using a multi-tooth cutter to cut threads more quickly. Thread Rolling Dies: For larger-scale cut threads, dies may be used to guide and cut the threads accurately. Cutting lubricant is often applied to reduce friction, prevent overheating, and improve surface finish. 4. Inspection and Finishing: The cut threads are inspected for dimensional accuracy using gauges or thread measuring tools. Additional finishing steps like deburring or heat treatment may follow to improve durability and performance. Why Use Cut Threading for Fasteners? Tailored Solutions: Enables the creation of threads for non-standard fasteners or components with unique designs. Material Flexibility: Effective for hard-to-machine metals or materials unsuitable for rolling. Critical Applications: Provides the precision and control required for high-performance or safety-critical threaded components. Advantages of Cut Threading: High Precision: Allows for extremely accurate threads with tight tolerances, which are critical for high-performance fasteners. Customizability: Can produce non-standard or special threads for unique applications. Versatility: Suitable for a wide range of materials, including alloys and harder metals. Surface Quality: Produces threads with a smooth finish and sharp definition. Applications in Engineered Fasteners: Cut threading is typically used for the following: Custom or Prototype Fasteners: Threads can be tailored to unique specifications or non-standard sizes. Hard Materials: Effective for threading materials like titanium, hardened steel, or nickel alloys that are challenging to form using other methods. Low-Volume Production: Suitable for small batches where thread rolling or other methods may not be cost-effective. Precision Applications: Used where high accuracy and tight tolerances are required, such as in aerospace or nuclear components. Limitations Material Waste: Material is removed during the process, resulting in waste. Slower Production: Compared to thread rolling, cut threading is slower and less efficient for high-volume production. Weaker Threads: Threads created by cutting can have lower fatigue resistance compared to rolled threads due to the interruption of the material grain structure. Tool Wear: Cutting tools can wear out quickly, especially when threading harder materials. Cold Heading Hot Heading EDM Milling Turning Swiss Machining Drilling Roll Threading Cut Threading Broaching Heat Treatment Austenitizing Tempering Normalizing Stress Relieving Grinding Polishing Dot Peen Marking Laser Marking MANUFACTURING Explore our manufacturing capabilities OUR PRODUCTS Explore our products Specialty Engineered Fasteners Learn more about our Engineered Fasteners, precision-crafted for specialized and critical applications in diverse industries. Machined Parts Learn more about our custom-designed Machined Components expertly crafted for applications across a range of industries. Precision Shear Products Explore our shear product manufacturing and quality capabilities, delivering precision solutions for the most demanding applications. DOING WHATEVER IT TAKES Need product help or engineering support? Contact our team of fastener experts today CONTACT

MANUFACTURING PROCESSES Milling Milling is a versatile and widely used manufacturing process in the production of engineered fasteners and components. It involves the removal of material from a workpiece to create desired shapes, dimensions, or features using a rotating cutting tool. The Milling Process: 1. Workpiece Setup: The raw material (workpiece) is secured on a milling machine table or in a vice. Materials used include metals like alloy steels, aluminum, stainless steel, titanium, and nickel alloys. 2. Tool Selection: A cutting tool, typically made of carbide, high-speed steel, or diamond-coated materials, is chosen based on the material and the desired operation. Tools may include end mills, face mills, or specialty cutters. 3. Cutting Operation: The cutting tool rotates at high speeds while the workpiece is moved along multiple axes (X, Y, and Z). The cutting process removes material in layers to achieve the desired geometry. 4. CNC Control (Optional): For precision manufacturing, CNC (Computer Numerical Control) milling machines are used to automate and control the process, ensuring repeatability and high accuracy. 5. Finishing and Inspection: After milling, the component may undergo additional operations like deburring, polishing, or coating to meet exact specifications. Types of Milling: Face Milling: Creates flat surfaces and finishes on the face of the workpiece. Peripheral (Side) Milling: Used to machine deep slots or contours along the sides of the workpiece. 3-Axis, 4-Axis, or 5-Axis Milling: Multi-axis machines allow for complex geometries and tight tolerances, crucial for precision-engineered components. Advantages of Milling: Versatility: Capable of producing a wide range of shapes and sizes. Precision: Provides tight tolerances and excellent surface finishes, especially with CNC milling. Material Compatibility: Works well with a variety of metals used in high-performance industries. Efficiency: CNC milling enables rapid and repeatable production. Applications in Engineered Fasteners: Milling is often used in the manufacturing of specialized or custom fasteners, as well as precision components. Specific applications include: Custom Shapes: Non-standard fasteners requiring unique geometries, such as grooves, threads, or hexagonal heads. Complex Components: Features like slots, holes, or keyways can be machined into parts. Prototype and Low-Volume Runs: Ideal for prototyping or producing small quantities of precision fasteners for aerospace, robotics, and defense applications. Adapters or Housings: Milling is used to create components that interface with fasteners, such as flanges, brackets, or mounting plates. Limitations Material Waste: Milling is a subtractive process, so material wastage can be significant compared to forming processes like cold or hot heading. Cost: Milling can be more expensive for high-volume production compared to other methods like cold heading. Complexity: Extremely intricate geometries may require additional processes or more advanced equipment. Cold Heading Hot Heading EDM Milling Turning Swiss Machining Drilling Roll Threading Cut Threading Broaching Heat Treatment Austenitizing Tempering Normalizing Stress Relieving Grinding Polishing Dot Peen Marking Laser Marking MANUFACTURING Explore our manufacturing capabilities OUR PRODUCTS Explore our products Specialty Engineered Fasteners Learn more about our Engineered Fasteners, precision-crafted for specialized and critical applications in diverse industries. Machined Parts Learn more about our custom-designed Machined Components expertly crafted for applications across a range of industries. Precision Shear Products Explore our shear product manufacturing and quality capabilities, delivering precision solutions for the most demanding applications. DOING WHATEVER IT TAKES Need product help or engineering support? Contact our team of fastener experts today CONTACT

SERVICING THE CUSTOMER Oil & Gas Home / Industries / Oil & Gas / Industry Overview Engineered fasteners and components used in the oil & gas industry are critical to ensuring safety, reliability, and efficiency in highly demanding environments. These components are often subject to extreme pressures, temperatures, and corrosive environments, making their design and material selection essential. KEY FEATURES High Strength: Engineered fasteners must handle high loads and stresses, especially in deep-sea or high-pressure drilling environments. Corrosion Resistance: Materials are selected for resistance to harsh conditions, including saltwater, hydrogen sulfide, and other corrosive agents found in drilling and production environments. Extreme Temperature Tolerance: Fasteners are designed to perform reliably under extreme heat or cold. Precision: Tight tolerances ensure a secure fit and minimize risks of failure during operation. WHEN ONLY THE BEST WILL DO Common Applications: Offshore and Subsea Operations: Used in risers, blowout preventers, and subsea trees. Drilling and Exploration Equipment: Fasteners in drill bits, drill string tools, and rigs. Completion and Production Equipment: A range of precisions parts from valve stems to fasteners used in electrical submersible pumps. Pipeline Infrastructure: High-performance nuts and bolts for flange connections in oil and gas pipelines. Refineries and Processing Facilities: Critical components in reactors, heat exchangers, and pressure vessels. Materials: Materials used in engineered fasteners for the oil & gas industry include: Alloy Steels: Known for strength and durability under high stress. Nickel Alloys: Excellent for high temperatures and corrosive environments. Stainless Steel: Offers good corrosion resistance and strength. Titanium: Lightweight and resistant to corrosion, ideal for specialized applications. MP35N: A nickel-cobalt alloy with superior strength and corrosion resistance in sour gas environments. Industry Standards: Engineered fasteners in oil & gas must comply with stringent industry standards, including: API Standards (e.g., API 20E/API 20F for critical application fasteners, API 6A for wellhead and tree equipment). API Q1 for quality management in the petroleum and natural gas industries. AMPP MR0175/ISO 15156 for materials used in sour gas conditions. ASME Standards for pressure vessel and piping applications. The TSP Manufacturing Advantage TSP Manufacturing specializes in providing custom-engineered fasteners designed for critical applications in the oil & gas sector. Our fasteners deliver exceptional reliability to minimize downtime, with customized solutions to meet specific project requirements, and compliance with all relevant industry regulations and standards. OUR PRODUCTS Explore our products Specialty Engineered Fasteners Learn more about our Engineered Fasteners, precision-crafted for specialized and critical applications in diverse industries. Machined Parts Learn more about our custom-designed Machined Components expertly crafted for applications across a range of industries. Precision Shear Products Explore our shear product manufacturing and quality capabilities, delivering precision solutions for the most demanding applications. Valve Stems Learn more about our Engineered Valve Stems, designed for demanding applications requiring exceptional strength, durability, and precision. DOING WHATEVER IT TAKES Need product help or engineering support? Contact our team of fastener experts today CONTACT Get a quote for your upcoming project CONTACT

Alex Dundas Operational Research Engineer BIO Alex joined WN Global sister company U.S. Bolt Manufacturing in 2014 as a Manufacturing Engineer. After earning a master’s degree in Operational Research, Alex joined TSP Manufacturing in 2023. As an Operational Research Engineer at TSP Manufacturing, Alex combines analytical expertise with a deep understanding of manufacturing systems to drive efficiency and innovation. With a passion for problem-solving, Alex specializes in optimizing production workflows, enhancing quality control processes, and leveraging data to inform strategic decisions. BACK

MANUFACTURING PROCESSES Heat Treatment: Normalizing Normalizing is a heat treatment process that enhances the uniformity of microstructure and mechanical properties in engineered fasteners and components. It is primarily used to refine grain size, improve machinability, and prepare the material for subsequent processing steps. This process involves heating the material to a temperature above its critical range, followed by air cooling, resulting in a more consistent and desirable microstructure. The Normalizing Process: 1. Heating: The fastener or component is heated to a temperature above the upper critical point (typically between 830°C and 950°C or 1526°F to 1742°F for steels, depending on the alloy). At this temperature, the microstructure transforms to austenite. 2. Soaking: The component is held at the normalizing temperature for a sufficient time to allow for complete transformation and homogenization of the austenite structure. The duration depends on the material thickness and composition. 3. Cooling: The component is removed from the furnace and allowed to cool in still air at room temperature. The cooling rate is slower than quenching but faster than annealing, producing a refined and uniform microstructure, typically a mixture of ferrite and pearlite in steels. Effects of Normalizing: Grain Refinement: The process refines the grain size, enhancing the toughness and strength of the material. Stress Relief: Internal stresses caused by previous manufacturing processes (such as forging or rolling) are relieved, reducing the risk of distortion during machining. Uniform Microstructure: Normalizing produces a uniform and predictable microstructure, improving the material’s overall properties. Improved Machinability: The resulting microstructure makes the material easier to machine and work with. Example of Normalizing in Fastener Manufacturing: 1. Material: Low-carbon steel (e.g., 1020 steel). 2. Heating: The steel bolt is heated to 900°C (1652°F). 3. Tempering: The bolt is held at this temperature for 30 minutes to ensure complete transformation. 4. Cooling: The bolt is air-cooled, resulting in a fine-grained ferrite and pearlite structure. 5. Outcome: The bolt has improved toughness and machinability, making it suitable for further shaping or heat treatment. Advantages of Normalizing for Fasteners: Enhanced Toughness: The refined grain structure improves toughness, making the fasteners less prone to brittle failure. Dimensional Stability: Components experience reduced warping or distortion during machining or further processing. Consistent Mechanical Properties: Normalizing ensures a uniform distribution of mechanical properties throughout the fastener. Reduced Cost: As air cooling is used, normalizing is more cost-effective than quenching processes that require special cooling media. Applications in Engineered Fasteners: Pre-Processing Step: Normalizing is often performed before further heat treatments, such as quenching and tempering, to ensure uniform properties. Fasteners with Complex Shapes: Bolts, screws, and studs with intricate designs benefit from reduced residual stresses and enhanced dimensional stability. Critical Components: Fasteners for high-stress applications, such as in aerospace, nuclear, and turbomachinery, rely on normalizing for consistent mechanical properties. Challenges in Normalizing: Oxidation and Scaling: Surface oxidation can occur during heating unless the process is performed in a controlled atmosphere. Limited Hardening: Normalizing does not produce the same level of hardness as quenching. Material-Specific Parameters: The process must be tailored to the specific material and component requirements for optimal results. Why Normalizing is Essential: Normalizing is a foundational heat treatment process that enhances the reliability and performance of engineered fasteners. By producing a refined and uniform microstructure, it prepares the fasteners for subsequent machining and heat treatment processes, ensuring they meet the demanding requirements of industries such as aerospace, automotive, and energy. Cold Heading Hot Heading EDM Milling Turning Swiss Machining Drilling Roll Threading Cut Threading Broaching Heat Treatment Austenitizing Tempering Normalizing Stress Relieving Grinding Polishing Dot Peen Marking Laser Marking MANUFACTURING Explore our manufacturing capabilities OUR PRODUCTS Explore our products Specialty Engineered Fasteners Learn more about our Engineered Fasteners, precision-crafted for specialized and critical applications in diverse industries. Machined Parts Learn more about our custom-designed Machined Components expertly crafted for applications across a range of industries. Precision Shear Products Explore our shear product manufacturing and quality capabilities, delivering precision solutions for the most demanding applications. DOING WHATEVER IT TAKES Need product help or engineering support? Contact our team of fastener experts today CONTACT

testing capabilities Plug Gauge A Plug Gauge is a precision inspection tool used to verify the internal dimensions of cylindrical components, such as threaded holes or bores. Plug gauges provide a simple and highly accurate method for confirming that a part’s internal diameter or thread depth meets design specifications. They are especially useful for quality inspection of engineered fasteners, ensuring mating parts will fit correctly and function as intended. How the Inspection is Performed Calibration – The plug gauge is checked and, if necessary, adjusted to match the nominal diameter or thread standard for the part being tested. Insertion – The gauge is inserted into the internal feature of the component, such as a threaded hole or bore. Fit Verification – A proper fit indicates that the part is within tolerance, while a tight or loose fit signals that the part may be out of specification. Repeatability – Multiple parts can be quickly tested with the same gauge, making it ideal for high-volume production. Documentation – Inspection results are recorded for traceability and quality assurance. Why It is Performed Plug Gauge inspection ensures that internal dimensions, such as bores and threads, meet tight tolerances. This is critical because even small deviations can affect assembly, load transfer, and overall component performance. Using plug gauges allows TSP Manufacturing to verify dimensional accuracy efficiently and reliably, preventing defective parts from entering service. Confirms internal diameters and thread dimensions Detects out-of-tolerance components before assembly Provides fast, repeatable inspection for high-volume production Ensures consistent quality and fit for mating parts Application to Engineered Fasteners Engineered fasteners often engage with other components through threaded holes or precision bores. Accurate internal dimensions are essential for proper load distribution, secure fastening, and safe operation. By using Plug Gauge inspections, TSP Manufacturing ensures: Accurate thread and bore dimensions for proper mating and assembly Conformance to design tolerances for safety-critical applications Consistent quality across production runs Reliability in high-performance industries such as aerospace, defense, oil & gas, and nuclear Standards & Compliance TSP Manufacturing performs Plug Gauge inspections in accordance with ASME, ASTM, ISO, and customer-specific standards . Our gauges are routinely calibrated, and inspectors follow rigorous protocols to ensure precise, traceable measurements. Adherence to these standards reinforces TSP’s credibility and commitment to delivering engineered fasteners that consistently meet the highest quality and performance expectations. DOING WHATEVER IT TAKES Need product help or engineering support? Contact our team of fastener experts today CONTACT OUR PRODUCTS Explore our products Specialty Engineered Fasteners Learn more about our Engineered Fasteners, precision-crafted for specialized and critical applications in diverse industries. Machined Parts Learn more about our custom-designed Machined Components expertly crafted for applications across a range of industries. Precision Shear Products Explore our shear product manufacturing and quality capabilities, delivering precision solutions for the most demanding applications.

MANUFACTURING PROCESSES Cold Heading Cold heading is a manufacturing process used to create engineered fasteners and components by forming metal without the application of heat. The Process of Cold Heading: 1. Material Selection: Typically, ductile metals like alloy steels, stainless steel, aluminum, titanium, and nickel alloys are chosen for cold heading due to their malleability. 2. Wire Preparation: A metal wire, which serves as the raw material, is cut to the desired length, often referred to as a “slug.” 3. Cold Forming: The wire or slug is inserted into a die and subjected to high-pressure force using a punch. The metal deforms plastically to take the shape of the die and punch, without requiring heating beyond room temperature. 4. Multiple Stages (Optional): Complex fasteners or components may require several stages of heading, where the part is progressively shaped into the desired geometry. 5. Trimming and Threading: Excess material is trimmed, and threads or other detailed features are added if needed. 6. Heat Treatment and Coating (Post-Process): While cold heading itself avoids heating, parts may undergo heat treatment after forming to enhance strength or other properties. Surface coatings can be applied for added corrosion resistance. Advantages of Cold Heading: Strength: The process aligns the grain structure of the material, enhancing the mechanical properties of the fasteners. Precision: It allows for tight tolerances, critical for engineered components used in demanding applications. Cost-Effectiveness: Material wastage is minimized compared to machining, and the process is highly efficient for mass production. Surface Finish: Produces a smooth surface, reducing the need for additional finishing operations. Applications in Engineered Fasteners: Cold heading is particularly suited for producing high-performance fasteners used in industries like: Aerospace and Defense: For lightweight, high-strength components. Oil & Gas and Marine: For corrosion-resistant fasteners exposed to harsh environments. Automotive and Robotics: For precision-engineered fasteners that require tight tolerances. Cold Heading Hot Heading EDM Milling Turning Swiss Machining Drilling Roll Threading Cut Threading Broaching Heat Treatment Austenitizing Tempering Normalizing Stress Relieving Grinding Polishing Dot Peen Marking Laser Marking MANUFACTURING Explore our manufacturing capabilities OUR PRODUCTS Explore our products Specialty Engineered Fasteners Learn more about our Engineered Fasteners, precision-crafted for specialized and critical applications in diverse industries. Machined Parts Learn more about our custom-designed Machined Components expertly crafted for applications across a range of industries. Precision Shear Products Explore our shear product manufacturing and quality capabilities, delivering precision solutions for the most demanding applications. DOING WHATEVER IT TAKES Need product help or engineering support? Contact our team of fastener experts today CONTACT

MANUFACTURING PROCESSES Heat Treatment: Austenitizing Austenitizing is a critical stage in the heat treatment process, particularly for engineered fasteners and components made from steel and certain alloys. It is the process of heating the material to a temperature where its crystal structure transforms into austenite, a face-centered cubic (FCC) structure that allows for the redistribution of carbon and other alloying elements within the metal. This transformation is essential for subsequent heat treatment steps like quenching and tempering. The Austenitizing Process: 1. Preparation: The fastener or component is cleaned to remove any surface contaminants (oil, grease, or scale) that could interfere with the heat treatment process. 2. Heating to Austenitizing Temperature: The component is heated to a temperature range specific to the material: For carbon steels: Typically between 750°C and 950°C (1382°F to 1742°F). For alloy steels: The temperature varies depending on alloying elements but is generally higher. The goal is to transform the steel’s microstructure from ferrite (body-centered cubic, BCC) and pearlite into austenite (FCC). 3. Soaking: The component is held at the austenitizing temperature for a specific period to ensure uniform heating and complete transformation to austenite. The soaking time depends on the material’s size, composition, and thermal conductivity. 4. Redistribution of Carbon: During austenitizing, carbon and other alloying elements dissolve into the austenite, creating a uniform composition that sets the stage for subsequent heat treatment steps. 5. Cooling (Quenching): After austenitizing, the component is rapidly cooled (quenched) to lock in the desired microstructure, such as martensite, which provides high strength and hardness. Key Considerations for Austenitizing in Fastener Manufacturing: Material Selection: Not all materials can be austenitized; it is most effective for steels and specific alloys designed for heat treatment. Controlled Atmosphere: Using vacuum or inert gases (e.g., argon or nitrogen) prevents oxidation and decarburization during heating. Post-Treatment Inspection: Fasteners are inspected for hardness, microstructure, and dimensional stability after heat treatment to ensure quality. Benefits of Austenitizing for Fasteners: Uniform Microstructure: Austenitizing ensures that carbon and alloying elements are evenly distributed, providing consistent properties throughout the fastener. Improved Strength: Austenite transforms into martensite upon quenching, greatly enhancing the fastener’s hardness and strength. Customizable Properties: By controlling the austenitizing temperature and time, manufacturers can tailor the fastener’s properties to meet specific application requirements. Foundation for Toughness: Subsequent tempering processes build on the martensitic structure formed after austenitizing, balancing hardness and ductility. Applications in Engineered Fasteners: Austenitizing is a fundamental step in producing fasteners with enhanced mechanical properties, including: Bolts and Screws: High-strength bolts used in aerospace, automotive, and structural applications. Threaded Rods and Studs: Components requiring high tensile strength and wear resistance. Critical Fasteners: Custom fasteners used in extreme environments, such as oil & gas, nuclear power, and turbomachinery. Challenges in Austenitizing: Temperature Control: Precise control of temperature is crucial; overheating can lead to grain growth, weakening the fastener, while underheating may result in incomplete transformation. Decarburization: If not done in a controlled atmosphere (e.g., vacuum or inert gas), carbon can be lost from the surface, reducing the fastener’s strength. Quenching Cracks: Improper quenching after austenitizing can cause thermal stresses and cracking, especially in larger or more complex fasteners. Cold Heading Hot Heading EDM Milling Turning Swiss Machining Drilling Roll Threading Cut Threading Broaching Heat Treatment Austenitizing Tempering Normalizing Stress Relieving Grinding Polishing Dot Peen Marking Laser Marking MANUFACTURING Explore our manufacturing capabilities OUR PRODUCTS Explore our products Specialty Engineered Fasteners Learn more about our Engineered Fasteners, precision-crafted for specialized and critical applications in diverse industries. Machined Parts Learn more about our custom-designed Machined Components expertly crafted for applications across a range of industries. Precision Shear Products Explore our shear product manufacturing and quality capabilities, delivering precision solutions for the most demanding applications. DOING WHATEVER IT TAKES Need product help or engineering support? Contact our team of fastener experts today CONTACT

testing capabilities Ultrasonic Testing (UT) Ultrasonic Testing (UT) is a non-destructive testing (NDT) method that uses high-frequency sound waves to detect internal and surface-connected flaws in solid materials. By sending sound waves through a component and analyzing the reflected signals, UT can identify cracks, voids, inclusions, and other discontinuities that are invisible to the eye. This makes it one of the most reliable techniques for ensuring the structural integrity of critical components. How the Test is Performed Preparation – The surface of the fastener or component is cleaned to ensure proper sound transmission. Couplant Application – A gel or liquid couplant is applied to facilitate the transmission of ultrasonic waves from the probe into the part. Sound Wave Transmission – An ultrasonic transducer emits high-frequency sound waves into the material. Signal Reflection – If the waves encounter a defect or boundary within the material, they reflect back to the probe. Data Analysis – The signals are displayed on a screen, allowing inspectors to measure the location, size, and type of any discontinuities. Documentation – Results are recorded to ensure traceability and compliance with quality standards. Why It is Performed Ultrasonic Testing is performed to safeguard the reliability of engineered fasteners and machined components where internal integrity is just as important as external quality. Unlike surface-only tests, UT provides insight into the entire volume of the material , making it highly effective for detecting hidden flaws that could compromise performance in service. Detects internal cracks, voids, and inclusions before they become failure points Ensures product integrity under extreme stresses and operating conditions Prevents costly downtime and safety risks by verifying quality before use Application to Engineered Fasteners Engineered fasteners are often used in safety-critical and high-stress environments — from aerospace engines to offshore oil & gas equipment. A flaw inside the material, even if invisible from the outside, can grow under load and lead to catastrophic failure. By using Ultrasonic Testing, TSP Manufacturing ensures that: Fasteners are free of hidden defects that compromise strength and durability Components meet the strict requirements of industries where failure is not an option Customers have complete confidence in the integrity and reliability of every part we produce Standards & Compliance TSP Manufacturing conducts Ultrasonic Testing in accordance with established industry standards, including ASTM, ASME, and AWS specifications , as well as customer-specific requirements. Our inspectors are trained and qualified under recognized NDT certification programs, ensuring every test is accurate and consistent. This strict adherence to standards not only builds credibility but also guarantees that our fasteners and components are compliant with the stringent quality expectations of industries such as aerospace, defense, nuclear, and oil & gas. DOING WHATEVER IT TAKES Need product help or engineering support? Contact our team of fastener experts today CONTACT OUR PRODUCTS Explore our products Specialty Engineered Fasteners Learn more about our Engineered Fasteners, precision-crafted for specialized and critical applications in diverse industries. Machined Parts Learn more about our custom-designed Machined Components expertly crafted for applications across a range of industries. Precision Shear Products Explore our shear product manufacturing and quality capabilities, delivering precision solutions for the most demanding applications.

MANUFACTURING PROCESSES Heat Treatment: Stress Relieving Stress relieving is a heat treatment process designed to reduce internal stresses within engineered fasteners and components without significantly altering their mechanical properties or microstructure. These internal stresses typically arise from previous manufacturing processes such as forging, machining, welding, or cold working. Stress relieving ensures dimensional stability and reduces the risk of distortion or failure during subsequent use. The Stress Relieving Process: 1. Heating: The fastener or component is heated to a temperature below the material’s critical transformation point, typically ranging from 480°C to 650°C (900°F to 1200°F) for steel, depending on the alloy and application. 2. Soaking: The fastener is held at the target temperature for a sufficient time to allow the redistribution and relaxation of internal stresses. The duration depends on the component’s size and complexity, often ranging from 1 to 2 hours. 3. Cooling: After soaking, the fastener is cooled at a controlled rate, usually in still air, to prevent the reintroduction of stresses. Effects of Stress Relieving: Reduction of Residual Stresses: Internal stresses caused by prior manufacturing processes are reduced, improving dimensional stability and reducing the risk of cracking. Improved Performance: Stress-relieved fasteners are less prone to failure under cyclic or dynamic loading, enhancing fatigue resistance. Minimal Impact on Mechanical Properties: Stress relieving does not significantly change the hardness, strength, or microstructure of the material. Enhanced Machinability: Reduced stresses can make machining operations smoother and more predictable. Example of Stress Relieving in Fastener Manufacturing: 1. Material: Alloy steel bolt (e.g., 4140 steel). 2. Pre-Stress Relieving Process: The bolt undergoes cold heading and thread rolling, creating residual stresses. 3. Stress Relieving: The bolt is heated to 600°C (1112°F) and held for 2 hours. Air cooling is used to avoid rapid temperature changes. 4. Outcome: Internal stresses are reduced, ensuring the bolt maintains dimensional accuracy and resists fatigue during use. Benefits of Stress Relieving for Fasteners: Dimensional Stability: Reduces the risk of warping or distortion during further processing or use. Extended Service Life: Improved resistance to fatigue and stress-corrosion cracking enhances the durability of fasteners. Ease of Assembly: Stress-relieved fasteners have better thread alignment and fit, simplifying assembly operations. Enhanced Safety: Reduced internal stresses minimize the likelihood of sudden or catastrophic failure under load. Applications in Engineered Fasteners: Post-Machining: Fasteners that undergo significant material removal, such as bolts and studs, are stress-relieved to ensure dimensional accuracy. Cold-Worked Components: Stress relieving mitigates the stresses induced during cold heading, forming, or rolling operations. Welded Assemblies: Welded fastener assemblies, such as anchors or large bolts, benefit from stress relieving to improve their integrity and reliability. Critical Fasteners: Fasteners used in high-stress environments, such as aerospace or nuclear industries, require stress relieving for enhanced performance and safety. Challenges in Stress Relieving: Overheating: Heating the material above its critical transformation temperature can alter its microstructure, defeating the purpose of stress relieving. Oxidation: Without a controlled atmosphere, surface scaling or oxidation may occur, affecting the fastener’s appearance and performance. Residual Stress Redistribution: Uneven heating or cooling can reintroduce residual stresses, so process control is critical. Why Stress Relieving is Essential: Stress relieving ensures engineered fasteners and components perform reliably in demanding applications by reducing internal stresses while maintaining their inherent material properties. This makes it a vital step in manufacturing high-quality fasteners for industries requiring precision, strength, and safety. Cold Heading Hot Heading EDM Milling Turning Swiss Machining Drilling Roll Threading Cut Threading Broaching Heat Treatment Austenitizing Tempering Normalizing Stress Relieving Grinding Polishing Dot Peen Marking Laser Marking MANUFACTURING Explore our manufacturing capabilities OUR PRODUCTS Explore our products Specialty Engineered Fasteners Learn more about our Engineered Fasteners, precision-crafted for specialized and critical applications in diverse industries. Machined Parts Learn more about our custom-designed Machined Components expertly crafted for applications across a range of industries. Precision Shear Products Explore our shear product manufacturing and quality capabilities, delivering precision solutions for the most demanding applications. DOING WHATEVER IT TAKES Need product help or engineering support? Contact our team of fastener experts today CONTACT

MANUFACTURING PROCESSES Grinding Grinding is a precision manufacturing process widely used in the production of engineered fasteners and components to achieve tight tolerances, high surface finish quality, and accurate dimensions. It involves the use of an abrasive wheel that removes material through controlled wear, shaping the fastener to its required specifications. The Grinding Process: 1. Setup: The fastener or component is securely held in place using fixtures or chucks, ensuring stability during the grinding process. 2. Abrasive Wheel: A rotating abrasive wheel, typically made of materials like aluminum oxide, silicon carbide, or diamond, is used to remove material from the workpiece. The wheel’s grain size, bond type, and hardness are chosen based on the material and desired finish. 3. Material Removal: The grinding wheel contacts the workpiece surface, removing material through abrasion. This generates heat, which is managed with a coolant to prevent thermal damage or distortion. 4. Precision and Finish: Grinding is capable of producing extremely tight tolerances (often within microns) and smooth surface finishes, making it ideal for critical fastener components. Types of Grinding for Fasteners: 1. Surface Grinding: Used for flat or slightly contoured surfaces on fasteners, such as flange faces or bolt heads. Ensures uniformity and smoothness. 2. Cylindrical Grinding: Common for shafts, pins, and bolts where the cylindrical shape requires precise diameters and surface finishes. Both external and internal cylindrical grinding can be applied. 3. Centerless Grinding: Ideal for mass-producing fasteners with cylindrical shapes (e.g., bolts and rods). The fastener is held between a grinding wheel and a regulating wheel, eliminating the need for a center or chuck. 4. Thread Grinding: Used to form precise threads on screws and bolts with high accuracy and excellent surface finishes. 5. Form Grinding: Shapes the fastener to a specific profile, often used for unique or complex designs. Benefits of Grinding for Fasteners: High Precision: Achieves tolerances as low as ±0.001 mm, critical for applications requiring exact fits. Superior Surface Finish: Provides mirror-like finishes with low surface roughness, reducing friction and wear. Versatility: Can process a wide range of materials, including hard-to-machine alloys like titanium, nickel, and MP35N. Customizability: Adapts to specific profiles and designs for specialized fastener applications. Applications in Engineered Fasteners: Thread Finishing: Ensures precision threads for bolts, screws, and studs, critical in aerospace and nuclear industries. Dimensional Control: Achieves tight tolerances for fasteners used in high-performance applications. Surface Enhancement: Produces smooth, wear-resistant surfaces for improved performance and durability. Pre- and Post-Coating Preparation: Prepares surfaces for coatings or polishes them after treatment for aesthetic or functional purposes. Challenges in Grinding: Thermal Damage: Excessive heat from grinding can lead to material distortion or surface microcracking, especially in heat-treated materials. Coolants are essential to manage heat. Tool Wear: Abrasive wheels wear over time, requiring regular maintenance or replacement. Cycle Time: Grinding can be slower than other material removal processes, especially for large-scale production. Cost: The precision and specialized equipment required make grinding more expensive than other finishing methods. Why Grinding is Essential: Grinding is indispensable for producing high-precision fasteners with excellent surface quality, meeting the stringent requirements of industries like aerospace, defense, and medical. It ensures that fasteners perform reliably under extreme conditions, making it a cornerstone in advanced manufacturing. Cold Heading Hot Heading EDM Milling Turning Swiss Machining Drilling Roll Threading Cut Threading Broaching Heat Treatment Austenitizing Tempering Normalizing Stress Relieving Grinding Polishing Dot Peen Marking Laser Marking MANUFACTURING Explore our manufacturing capabilities OUR PRODUCTS Explore our products Specialty Engineered Fasteners Learn more about our Engineered Fasteners, precision-crafted for specialized and critical applications in diverse industries. Machined Parts Learn more about our custom-designed Machined Components expertly crafted for applications across a range of industries. Precision Shear Products Explore our shear product manufacturing and quality capabilities, delivering precision solutions for the most demanding applications. DOING WHATEVER IT TAKES Need product help or engineering support? Contact our team of fastener experts today CONTACT