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testing capabilities Cleanliness Test A Cleanliness Test is a quality inspection method used to determine the level of contaminants—such as oils, grease, machining residues, metal shavings, or foreign particles—present on a manufactured component. For engineered fasteners and precision-machined parts, even trace contamination can affect performance, assembly, or long-term reliability, making cleanliness verification a critical part of the quality process. How the Test is Performed Sample Preparation – The fastener or machined component is handled under controlled conditions to prevent outside contamination. Extraction of Contaminants – Solvents, ultrasonic agitation, or pressurized fluids are used to dislodge surface and embedded particles from the part. Collection & Filtration – Dislodged contaminants are collected and passed through a fine filter. Analysis – The particles and residues are measured by weight, size, or count using gravimetric, microscopic, or spectrographic methods. Evaluation Against Standards – Results are compared to customer or industry-defined cleanliness requirements. Why It is Performed Cleanliness Testing is performed to ensure that fasteners and machined components meet strict contamination-free requirements that protect assembly quality, performance, and durability. Prevents assembly issues such as galling, seizing, or torque misapplication Reduces risk of corrosion or premature wear caused by foreign particles Ensures compatibility with lubricants, coatings, and protective finishes Meets customer requirements for industries where contamination can cause system failure, such as aerospace, oil & gas, and defense Application to Engineered Fasteners Engineered fasteners often operate in demanding environments where any contamination can compromise safety and performance. Cleanliness Testing ensures that: Threads are free of foreign matter , ensuring accurate torque and preload during installation Critical surfaces are contaminant-free to support coatings, platings, and corrosion protection systems Fasteners meet customer cleanliness specifications , which are especially stringent in aerospace, nuclear, and defense applications Product integrity and reliability are maintained from manufacturing through installation Standards & Compliance TSP Manufacturing performs Cleanliness Testing in accordance with industry standards such as ISO 16232, VDA 19, and customer-specific cleanliness requirements . Testing equipment is maintained and calibrated, and results are fully documented for traceability. This adherence to recognized cleanliness standards reinforces TSP’s commitment to delivering engineered fasteners and machined components that meet the highest levels of quality, safety, and reliability. 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.

testing capabilities Creep Test A Creep Test measures how a material deforms over time when subjected to a constant load and elevated temperature. Unlike standard tensile or hardness tests, which provide immediate property data, creep testing evaluates a material’s long-term behavior under sustained stress . This test is especially important for fasteners used in high-temperature environments, where even small amounts of time-dependent deformation can lead to joint loosening, dimensional instability, or failure. How the Test is Performed Specimen Preparation – A fastener or representative sample is prepared and mounted in a creep testing machine. Constant Load Application – A steady load, typically a percentage of the material’s tensile strength, is applied. Elevated Temperature Exposure – The specimen is heated to a defined service-relevant temperature and maintained throughout the test. Monitoring Deformation – Elongation or strain is continuously measured over an extended period (ranging from hours to months). Data Collection – The rate of deformation and time to failure (if it occurs) are recorded and analyzed. Why It is Performed Creep testing is performed to predict how materials and fasteners will behave under long-term service conditions , particularly in environments involving high heat and sustained loads. This ensures that components will not gradually deform or fail in ways that could compromise equipment safety and reliability. Evaluates time-dependent deformation at elevated temperatures Predicts service life under continuous stress Verifies material and heat-treatment suitability Prevents dimensional changes or joint failures in critical applications Application to Engineered Fasteners Engineered fasteners often operate in turbomachinery, aerospace engines, nuclear reactors, and energy systems , where they are exposed to both constant loads and extreme temperatures. Creep testing helps TSP Manufacturing ensure that fasteners: Maintain dimensional stability over long service periods Resist gradual loosening that could compromise bolted joints Perform reliably in high-temperature environments Extend equipment lifespan by preventing premature failure Standards & Compliance At TSP Manufacturing, creep testing is performed in compliance with ASTM, ISO, and industry-specific standards to ensure reliable and repeatable results. Our testing equipment is precisely calibrated, and all testing is carried out by qualified personnel. By adhering to these recognized standards, we provide customers with confidence that our engineered fasteners and machined components will meet the demanding requirements of industries where long-term, high-temperature performance is essential. 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

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.

testing capabilities Spectrographic Product Analysis Spectrographic Product Analysis is a precise method used to determine the elemental composition of metals and alloys . By analyzing the spectrum of light emitted from a sample when it is excited by a high-energy source, this technique identifies the presence and concentration of specific elements. For engineered fasteners, this ensures that the material conforms exactly to the required alloy or specification, which is critical for strength, corrosion resistance, and performance. How the Test is Performed Sample Preparation – The fastener or material sample is cleaned to remove contaminants such as oils, coatings, or dirt. Excitation – The sample is exposed to a high-energy source (often an electrical spark or arc) that excites the atoms in the material. Spectral Measurement – The emitted light is captured and analyzed using a spectrometer to determine the types and concentrations of elements present. Comparison to Specifications – Results are compared against the required alloy or material specification to verify compliance. Documentation – Data is recorded and retained for traceability and quality assurance. Why It is Performed Spectrographic Product Analysis is performed to ensure that materials meet strict chemical composition requirements , which directly affect mechanical performance, corrosion resistance, and reliability. This test prevents the use of incorrect or substandard materials that could compromise the safety and effectiveness of engineered fasteners. Confirms alloy composition and grade accuracy Detects impurities or deviations from material specifications Ensures consistent performance and durability Supports regulatory, customer, and industry requirements Application to Engineered Fasteners Engineered fasteners rely on precise material properties to perform under high stress, temperature, and corrosive conditions. Spectrographic Product Analysis ensures that: All fasteners are manufactured from the correct alloys to meet strength and corrosion resistance standards Material consistency is maintained across production batches Customer and regulatory requirements for traceability and quality are satisfied Performance and safety are assured in critical industries such as aerospace, oil & gas, nuclear, and defense Standards & Compliance TSP Manufacturing conducts Spectrographic Product Analysis in accordance with ASTM, ISO, and customer-specific standards . Equipment is regularly calibrated, and testing is performed by trained personnel to guarantee accurate, repeatable, and traceable results. Adherence to these recognized standards demonstrates TSP’s commitment to quality and reliability, ensuring that engineered fasteners and machined components consistently meet the highest industry 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.

testing capabilities Microstructure Examination Microstructure Examination is a metallurgical analysis method that evaluates the fine structure of metals and alloys at high magnification, typically using an optical or electron microscope. This test reveals important features such as grain size, phase distribution, inclusions, and the effects of heat treatment. For engineered fasteners, microstructural evaluation ensures that the material possesses the right combination of strength, toughness, and durability for critical applications. How the Test is Performed Sample Preparation – A small section of the fastener or component is cut, mounted in resin, and polished to a mirror finish. Etching – The polished sample is etched with a chemical reagent that highlights grain boundaries and microstructural features. Microscopic Examination – The etched surface is examined under a microscope at high magnification (typically 50x–1000x). Analysis of Features – Inspectors evaluate grain size, inclusion content, carbide distribution, and other microstructural characteristics. Comparison to Standards – Results are measured against metallurgical standards and customer specifications. Why It is Performed Microstructure Examination is performed to verify that the material processing and heat treatment have produced the desired properties for reliable performance. Confirms proper heat treatment and phase transformations Evaluates grain size for strength and fatigue resistance Detects undesirable phases, inclusions, or micro-cracks Ensures consistency across production batches Application to Engineered Fasteners Engineered fasteners are often subjected to high stresses, cyclic loading, and extreme environments . Microstructure Examination ensures that: Heat-treated fasteners meet strength and toughness requirements Microstructural uniformity is achieved , preventing weak points in the material Inclusions and impurities are controlled , reducing the risk of fatigue failure Product reliability is assured for industries like aerospace, nuclear, oil & gas, and defense Standards & Compliance TSP Manufacturing performs Microstructure Examinations in compliance with ASTM E3, ASTM E407, ASTM E112, ISO 643, and customer-specific requirements . All testing is conducted by qualified metallurgical staff using calibrated equipment to deliver accurate and traceable results. By adhering to these rigorous standards, TSP ensures that its engineered fasteners and machined components meet the highest levels of material quality and reliability demanded by critical industries. 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.

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.

testing capabilities Grain Size Examination Grain Size Examination is a metallurgical test used to measure the average size of crystalline grains in a metal or alloy . Grain size plays a key role in determining mechanical properties such as strength, toughness, fatigue resistance, and corrosion performance. For engineered fasteners, controlling grain size is essential to ensuring they perform reliably under demanding conditions. How the Test is Performed Sample Preparation – A cross-section of the fastener or material is cut, mounted, and polished to a mirror finish. Etching – A chemical etchant is applied to reveal grain boundaries in the material. Microscopic Examination – The prepared sample is examined under an optical microscope. Measurement – Grain size is determined using comparison charts, line intercept methods, or digital image analysis in accordance with industry standards. Documentation – Results are recorded and compared against specification requirements. Why It is Performed Grain Size Examination is performed to confirm that the material’s microstructure supports the required mechanical properties . Finer grains generally increase strength and toughness (Hall-Petch relationship) Coarser grains may improve high-temperature performance in certain alloys Verifies that heat treatment and forging processes were properly executed Ensures consistency and reliability across production batches Application to Engineered Fasteners Engineered fasteners are used in critical applications where mechanical performance and reliability are non-negotiable . Grain size testing ensures that: Heat-treated fasteners achieve the desired strength and fatigue resistance Forged components exhibit proper grain flow and uniformity Material properties remain consistent across production lots Industry-specific performance requirements are met for sectors such as aerospace, nuclear, oil & gas, and defense Standards & Compliance TSP Manufacturing performs Grain Size Examinations in accordance with ASTM E112, ISO 643, and customer-specific requirements . Our trained metallurgical team uses calibrated equipment and standardized methods to deliver accurate, repeatable, and traceable results. By adhering to these rigorous standards, TSP demonstrates its commitment to producing engineered fasteners and machined components with verified structural integrity and long-term reliability. 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.

testing capabilities Magnetic Particle Testing (MT) Magnetic Particle Testing (MT) is a non-destructive testing (NDT) method used to detect surface and near-surface discontinuities in ferromagnetic materials, such as steel and iron alloys. The process relies on magnetizing a component and then applying fine magnetic particles. These particles gather at areas of flux leakage caused by defects, making cracks, seams, laps, or inclusions visible to inspectors. How the Test is Performed Preparation – The fastener or machined component is cleaned to remove oil, grease, and debris. Magnetization – A magnetic field is applied to the part, either directly (passing current through the component) or indirectly (using a magnetic yoke or coil). Application of Magnetic Particles – Fine iron particles, either dry or suspended in liquid, are applied to the surface. Indication of Defects – If a discontinuity is present, it distorts the magnetic field, causing particles to cluster at the flaw. Inspection – Inspectors examine the part under visible light or ultraviolet light (if fluorescent particles are used) to identify and interpret defect indications. Post-Test Cleaning – The component is demagnetized and cleaned after inspection. Why It is Performed Magnetic Particle Testing is performed to ensure that fasteners and machined components are free from cracks or other surface-connected flaws that could compromise performance. Because many engineered fasteners are used in high-stress, safety-critical environments, even a small crack can propagate and lead to premature failure. MT is a fast, cost-effective, and highly sensitive method for detecting these flaws before components enter service. Detects surface and slightly subsurface cracks, seams, and laps Ensures quality and safety of ferromagnetic components Provides quick, reliable results to support efficient production and inspection cycles Application to Engineered Fasteners For engineered fasteners, surface and near-surface integrity is critical. Fasteners experience extreme loads, cyclic stresses, and environmental exposure in industries such as aerospace, oil & gas, and nuclear power. A small crack or seam undetected at the surface can become the origin of a failure under load. By applying Magnetic Particle Testing, TSP Manufacturing ensures: Fasteners are free of surface defects that threaten strength and reliability High-performance components meet industry and customer requirements Confidence in the long-term durability of fasteners used in safety-critical applications Standards & Compliance At TSP Manufacturing, Magnetic Particle Testing is carried out in strict accordance with ASTM, ASME, and customer-specific standards . Our inspectors are qualified to recognized NDT certification programs, ensuring consistency and accuracy in every inspection. Adhering to these rigorous standards demonstrates our commitment to quality, builds customer confidence, and ensures that our engineered fasteners and machined components perform reliably in the world’s most demanding industries. 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.

testing capabilities Positive Material Identification (PMI) Positive Material Identification (PMI) is a non-destructive testing method used to verify the chemical composition of metals and alloys . PMI ensures that the material matches the specified grade or specification, preventing the use of incorrect or substandard materials in critical applications. This verification is essential for engineered fasteners, where material properties directly affect strength, corrosion resistance, and performance. How the Test is Performed Sample Preparation – The surface of the fastener or component is cleaned to remove coatings, oils, or debris. Analysis – A handheld or stationary X-ray fluorescence (XRF) or optical emission spectrometer (OES) device is used to analyze the elemental composition of the metal. Comparison to Specifications – The measured chemical composition is compared to the required material standard or grade. Documentation – Results are recorded, providing traceable verification of material compliance. Why It is Performed PMI is performed to prevent material mix-ups, ensure compliance with specifications, and guarantee performance and safety . Using the wrong material in a fastener could lead to reduced strength, corrosion failure, or catastrophic component failure in service. Confirms alloy and material grade accuracy Prevents use of incorrect or counterfeit materials Supports regulatory and customer requirements Ensures reliability and safety in critical applications Application to Engineered Fasteners Engineered fasteners must often meet strict material requirements to perform in high-stress, high-temperature, or corrosive environments. PMI ensures that: Fasteners are made from the correct alloys to meet mechanical and corrosion resistance requirements Material traceability is documented for quality assurance and regulatory compliance Performance is reliable in aerospace, oil & gas, nuclear, defense, and other critical industries Customer specifications are verified prior to assembly or delivery Standards & Compliance TSP Manufacturing performs PMI in accordance with ASTM, ASME, ISO, and customer-specific standards . All equipment is calibrated regularly, and testing is conducted by trained professionals to ensure accurate, repeatable, and traceable results. This adherence to recognized standards demonstrates TSP’s commitment to quality, safety, and delivering engineered fasteners and machined components that meet exacting specifications. 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: 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

MANUFACTURING PROCESSES Heat Treatment Heat treatment is a critical manufacturing process used to enhance the mechanical properties of engineered fasteners and components, such as strength, hardness, toughness, and wear resistance. It involves controlled heating and cooling of the material to alter its microstructure. This process is especially important for fasteners used in demanding applications across industries like aerospace, oil & gas, and nuclear power. The Heat Treatment Process for Engineered Fasteners: 1. Material Selection: Fasteners are typically made from materials such as alloy steels, stainless steels, titanium, or nickel-based alloys, which respond well to heat treatment. 2. Heat Treatment Stages: Heating: The fastener is heated to a specific temperature based on the desired material properties. This is done in furnaces that provide a controlled environment (e.g., vacuum, inert gas, or air). Soaking: The fastener is held at the target temperature for a specific duration to allow the heat to penetrate uniformly and achieve the desired microstructural changes. Cooling: The part is cooled at a controlled rate. The cooling method (e.g., air cooling, quenching in oil/water, or furnace cooling) determines the final properties of the material. 3. Common Heat Treatment Techniques: Austenitizing: The fastener is heated to a high temperature to transform the steel’s structure to austenite, preparing it for subsequent quenching or tempering. Tempering: Reheating quenched steel to a moderate temperature reduces brittleness while maintaining hardness and improving toughness. Normalizing: Steel is heated above its critical temperature and air-cooled to refine the grain structure, improving uniformity and mechanical properties. Stress Relieving: The fastener is heated to a moderate temperature and cooled slowly to reduce internal stresses from machining, welding, or prior heat treatment. Key Properties Achieved Through Heat Treatment: Hardness: Essential for wear resistance and durability. Tensile and Yield Strength: Determines the load-carrying capacity of the fastener. Ductility: Prevents fasteners from becoming too brittle, ensuring they can deform slightly without failing. Toughness: Improves resistance to impact and shock loads. Corrosion Resistance: Particularly important for stainless steels and alloys used in aggressive environments. Advantages of Heat Treatment: Enhanced Mechanical Properties: Improved hardness, tensile strength, ductility, and impact resistance. Improved Fatigue and Wear Resistance: Essential for fasteners in high-stress or abrasive environments. Corrosion Resistance: Heat treatment can enhance resistance to oxidation and chemical degradation. Dimensional Stability: Relieves internal stresses, reducing the risk of warping during use. Applications in Engineered Fasteners: Heat treatment is used to tailor the properties of fasteners for specific applications. Examples include: High-Strength Bolts and Screws: Fasteners requiring high tensile strength and fatigue resistance, such as those used in aerospace or automotive applications. Corrosion-Resistant Components: Stainless steel fasteners for marine, offshore, and nuclear environments are heat-treated to improve their corrosion resistance. Wear-Resistant Fasteners: Case-hardened fasteners are used in applications involving abrasion, such as industrial machinery. High-Temperature Components: Fasteners exposed to extreme heat, such as in turbines or engines, are heat-treated for thermal stability and creep resistance. Challenges and Considerations: Process Control: Precise temperature control and timing are critical to avoid overheating, decarburization, or material distortion. Material-Specific Techniques: The process must be tailored to the material to achieve the desired properties without compromising performance. Cost and Energy: Heat treatment can be energy-intensive and may add cost, but the performance improvements often justify the expense. 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