testing capabilities Hardness Test A Hardness Test is a method of measuring a material’s resistance to deformation, indentation, or scratching. In manufacturing, hardness is closely tied to strength, wear resistance, and durability—critical properties for engineered fasteners and machined components. Various hardness scales (such as Rockwell, Brinell, or Vickers) are used depending on the material and application, providing precise data to ensure that parts meet design and performance requirements. How the Test is Performed Preparation – The fastener or component surface is cleaned to remove oils, coatings, or debris that could affect accuracy. Indenter Application – A controlled load is applied using a standardized indenter (such as a steel ball or diamond cone). Measurement – The depth or size of the indentation is measured, then compared against the appropriate hardness scale. Repeatability – Multiple tests can be performed on different areas of the component to confirm consistency. Documentation – Results are recorded to provide traceable data for quality assurance and compliance. Why It is Performed Hardness testing is performed to ensure that materials and finished fasteners possess the necessary strength and durability for demanding applications. A fastener that is too soft may deform or wear prematurely, while one that is too hard may become brittle and prone to cracking. By verifying hardness, TSP Manufacturing ensures that every part meets the performance balance required for safety and reliability. Confirms material strength and durability Verifies heat treatment and manufacturing processes Prevents premature wear, deformation, or failure in service Ensures consistency across production runs Application to Engineered Fasteners Engineered fasteners often operate under extreme loads, vibration, and environmental stress. Their hardness level directly affects how they perform over time, especially in industries such as aerospace, oil & gas, defense, and nuclear power. By applying hardness testing, TSP Manufacturing ensures: Correct material properties for strength and toughness Verification of heat-treated fasteners to confirm proper hardness levels Prevention of failure modes related to excessive softness or brittleness Confidence in product performance for safety-critical applications Standards & Compliance TSP Manufacturing performs hardness testing in accordance with ASTM, ISO, and customer-specific standards , using properly calibrated equipment and certified procedures. Our inspectors are trained to ensure accuracy, consistency, and traceability across all test results. By adhering to these recognized standards, we reinforce customer confidence and demonstrate our commitment to delivering engineered fasteners and machined components that meet the highest quality 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.

Veronica Garcia Quality Assurance Supervisor BIO As Quality Assurance Supervisor at TSP Manufacturing, Veronica Garcia is dedicated to overseeing the implementation of quality systems and ensuring compliance with industry standards. With her strong background in quality assurance and process management, Veronica leads efforts to monitor and improve the quality of the company’s engineered fasteners. She works closely with cross-functional teams to identify areas for improvement, ensuring that each product meets the precise requirements for critical applications. Veronica’s commitment to maintaining excellence in quality is key to TSP Manufacturing’s continued success and reputation for superior products. BACK

Explore TSP Manufacturing's journey through our company timeline and meet the expert team driving innovation, quality, and precision in engineered fasteners. CELEBRATING OVER 87 YEARS About Us 1991 TSP’s sister company U.S. Bolt Manufacturing is launched 1994 TSP integrates Supply Chain agreement with Fortune 500 Original Equipment Manufacturer History of our timline 1938 Texas Screw Products (TSP) begins as a Full Line Distributor just north of Downtown Houston 1986 TSP is purchased and brought under the leadership of Walter Negley OUR TEAM John Warren Chief Executive Officer, WN Global Christopher Smith General Manager Alex Dundas Operational Research Engineer Norberto Diaz Engineering Manager OUR TEAM Travis Arbing Purchasing Manager Bill Arnold Sales Manager Sandra Aguilar Sales Manager Mirla Fonseca Sales Manager Randy Boatright Accounting Manager Get a quote for your upcoming project CONTACT 1997 TSP becomes ISO 9002-1994 registered 1998 TSP’s laboratory becomes accredited to ISO 17025 OUR TEAM Esvin Gomez Quality Manager Jesus Martinez Quality Control Supervisor Veronica Garcia Quality Assurance Supervisor Jose Medina Warehouse Supervisor 2008 TSP moves to its new location on West 12th Street, Houston Texas 2018 TSP becomes TSP Mfg., a WN Global Company, strengthening its relationship with sister company U.S. Bolt and enhancing the value delivered to the customer 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. EXCELLENCE IN MANUFACTURING Quality, Materials, and Engineering Solutions Quality Learn more about how we deliver the highest Quality Engineered Fasteners & Components for custom-designed products Materials Learn more about our manufacturing material capabilities for our Engineered Fasteners & Components Services Learn more about our product support and supply chain solutions for our customers Engineered Fastener & Components

TSP Manufacturing delivers engineered fasteners, machined parts, shear screws, and valve stems—precision-crafted for strength, durability, and critical applications. SERVICING THE CUSTOMER Our Products Fastening Solutions We specialize in delivering a diverse range of high-quality product tailored to meet the demanding needs of our customers’ specifications. Whether your requirements are highly specialized or standard, our product performs reliably in critical applications. DOING WHATEVER IT TAKES Need product help or engineering support? Contact our team of fastener experts today CONTACT INDUSTRIES WE SERVE Oil & Gas Turbomachinery Marine and Offshore Nuclear Aerospace Robotics and Automation Defense Space Get a quote for your upcoming project CONTACT EXCELLENCE IN MANUFACTURING Quality, Materials, and Engineering Solutions Quality Learn more about how we deliver the highest Quality Engineered Fasteners & Components for custom-designed products Materials Learn more about our manufacturing material capabilities for our Engineered Fasteners & Components Services Learn more about our product support and supply chain solutions for our customers Engineered Fastener & Components 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.

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

OUR PRODUCTS Standard Products Home / Products / Standard Products / One-Stop Fasteners Source In addition to the engineered parts we provide, TSP Manufacturing offers a comprehensive line of standard engineered and commercial fasteners, allowing us to be a one source provider to our customers. Washers Flat Washers Lock Washers Belleville Washers Beveled Washers Finishing Washers Square Washers Bonded Sealing Washers Hillside Washers Conical Washers Spherical Washers Wave Washers Round-Mall Washers Saddle Washers Screws Machine Screws Sheet Metal Screws Wood Screws Thread Cutting Screws Self-Drilling Screws Lag Screws SEMS Screws Thread Rolling Screws Binding Post Screw Products Thumb screws Drywall Screws Multiple Material Screws Wind Screws Drive Screws Eye Screws Weld Screws Collated Screws Flooring Screws Dowel Screws Roofing Screws Accordion Screws Euro Screws Jack Screws Bolts Cap Screws and Hex Bolts Carriage Bolts Flange Bolts Structural Bolts Tap Bolts Square Head Bolts Heavy Hex Cap Screws Heavy Hex Bolts Ferry Cap Screws U-bolts Plow Bolts Tension Control Bolts Hanger Bolts Elevator Bolts Eye Bolts Connector Bolts Tower Bolts Penta Bolts Step Bolts Coil Bolts Cam and Bolt Connectors J-bolts Timber Bolts Bin Bolts Sidewalk Bolts U-bolt Plates Askew Head Bolts Track Bolts Nuts Hex Nuts Lock Nuts Jam Nuts Heavy Hex Nuts Acorn Nuts Flange Nuts Slotted Nuts Wing Nuts Weld Nuts Coupling Nuts Square Nuts Spring Nuts Tee Nuts Castle Nuts Allen Nuts Cap Nuts High Nuts Cage Nuts Knurled Nuts Acme Nuts Palnuts Security Nuts Handle Nuts Coil Nuts Hurricane Nuts standard products include: NORD-LOCK PRODUCTS Nord-Lock’s Trusted Partner for the Energy Industry TSP Manufacturing is Nord-Lock’s preferred distributor to the energy industry offering prepackaged or custom quantities, and technical product support. LEARN MORE OUR PRODUCTS Explore other 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. Get a quote for your upcoming project CONTACT EXCELLENCE IN MANUFACTURING Quality, Materials, and Engineering Solutions Quality Learn more about how we deliver the highest Quality Engineered Fasteners & Components for custom-designed products Materials Learn more about our manufacturing material capabilities for our Engineered Fasteners & Components Services Learn more about our product support and supply chain solutions for our customers Engineered Fastener & Components Contact our product specialists today CONTACT

SERVICING THE CUSTOMER Marine and Offshore Home / Industries / Marine and Offshore / Industry Overview Engineered fasteners and components play a vital role in the marine and offshore industry, where durability, reliability, and resistance to harsh environmental conditions are paramount. These components are critical in ensuring the structural integrity and operational efficiency of vessels, offshore platforms, and related infrastructure. KEY FEATURES Corrosion Resistance: Fasteners are designed to withstand saltwater, humidity, and other corrosive elements that are prevalent in marine environments. High Strength: Structural integrity is crucial in applications exposed to dynamic loads, waves, and wind forces. Fatigue Resistance: Components endure constant vibration and stress, especially in moving structures like ships and oil rigs. Longevity: Fasteners are engineered to offer long service life, reducing the need for frequent replacements in hard-to-access locations. WHEN ONLY THE BEST WILL DO Common Applications: Shipbuilding: Fasteners are used in hull construction, engine mounts, propellers, and other critical ship components. Offshore Platforms: Includes components for rigs, subsea structures, and topside modules. Wind Farms: Specialized fasteners for offshore wind turbines, designed to handle high torque and corrosive environments. Mooring Systems: High-strength bolts and connectors for anchors and buoy systems. Piping and Valves: Secure connections in fluid transport systems for oil, gas, and water. Materials: Fasteners for marine and offshore applications are selected for their resistance to harsh conditions, including: Stainless Steels (Austenitic & Duplex): Offer excellent corrosion resistance and strength in saline environments. Nickel Alloys: Withstand extreme temperatures and corrosion from seawater. Titanium: Lightweight and corrosion-resistant, ideal for specialized applications. Bronze and Brass: Common in non-structural applications for their corrosion resistance and aesthetic qualities. Industry Standards: Marine and offshore fasteners must comply with strict industry standards to ensure safety and reliability, including: DNV (Det Norske Veritas) certification for offshore structures. ABS (American Bureau of Shipping) standards for marine applications. ISO Standards for quality, performance, and material specifications. The TSP Manufacturing Advantage TSP Manufacturing specializes in providing custom-engineered fasteners designed to meet the rigorous demands of the marine and offshore industry. Our fasteners are built to deliver unmatched corrosion resistance, enabling them to thrive in challenging marine environments, while offering superior mechanical performance to handle both dynamic and static loads. Additionally, they comply with industry certifications and standards, ensuring reliability and safety in every application. 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

SERVICING THE CUSTOMER Aerospace Home / Industries / Aerospace / Industry Overview Engineered fasteners and components are integral to the aerospace industry, where precision, reliability, and performance are essential to ensure the safety and efficiency of aircraft, spacecraft, and related systems. These components are required to withstand extreme conditions while adhering to the strictest industry standards. KEY FEATURES High Strength-to-Weight Ratio: Lightweight materials are used to minimize weight while maintaining structural integrity. Corrosion and Temperature Resistance: Fasteners must perform reliably in high-temperature and corrosive environments, such as jet engines or space applications. Fatigue and Vibration Resistance: Components are designed to endure repeated stress and vibration over extended service life. Precision Engineering: Tight tolerances and exacting specifications are critical to ensure secure connections and proper alignment. WHEN ONLY THE BEST WILL DO Common Applications: Aircraft Structure: Fasteners are used in fuselage panels, wings, tail assemblies, and landing gear. Engines: High-performance fasteners secure components in jet and rocket engines, where they are exposed to extreme heat and mechanical stress. Avionics and Instrumentation: Small, precise fasteners are essential for securing delicate electronic components and systems. Spacecraft: Fasteners are designed to handle the vacuum of space, radiation, and extreme temperature fluctuations. Interiors: Used in seating, cabin panels, and other interior components for commercial and military aircraft. Materials: The aerospace industry relies on advanced materials for fasteners to achieve strength, durability, and reduced weight, including: Titanium Alloys: Lightweight and highly resistant to corrosion and high temperatures. Superalloys (e.g., Inconel): Designed for extreme heat and stress, often used in engines. Aluminum Alloys: Lightweight and corrosion-resistant, suitable for less demanding applications. Stainless Steels: Provide strength and corrosion resistance in structural and engine components. Composite-Compatible Fasteners: Designed for use with modern composite materials. Industry Standards: Aerospace fasteners must comply with rigorous standards to ensure safety and reliability, including: NAS (National Aerospace Standards) and AN (Air Force-Navy) Standards for fasteners. AMS (Aerospace Material Specifications) for material properties and processing. MIL-SPEC standards for military applications. The TSP Manufacturing Advantage TSP Manufacturing specializes in custom-engineered fasteners for the critical requirements of aerospace applications. Our fasteners deliver exceptional strength, precision, and reliability while meeting stringent weight and performance demands. Manufactured to exacting industry standards, they ensure safety and efficiency in the most challenging environments, from high-altitude flight to deep-space exploration. 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

APPLY Careers Join the TSP Manufacturing Team Thank you for your interest in becoming part of TSP Manufacturing. To be considered for future opportunities, please click the button below to access the TSP Mfg. employment application. START APPLICATION Visit the WN Global careers page to explore job opportunities at TSP Manufacturing and our family of companies. LAUNCH CAREERS PAGE Empowering Our Greatest Assets At the WN Global family of companies, our people are our greatest assets. Get a quote for your upcoming project 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

Mirla Fonseca Sales Manager BIO With over a decade of experience in sales, account management, and project leadership, Mirla Fonseca, PMP, is a Specialized Inside Sales Manager at TSP Manufacturing. She brings together deep industry expertise and certified project management capabilities to deliver high-value, strategic solutions tailored to customer needs. Mirla’s background centers on advanced engineered fasteners and components for critical sectors including energy, industrial manufacturing, and infrastructure. Her Project Management Professional (PMP) certification enhances her ability to lead complex client projects with precision—ensuring technical alignment, on-time delivery, and measurable outcomes. Recognized for her collaborative approach and commitment to excellence, Mirla partners closely with customers to understand their objectives, proactively solve challenges, and build lasting relationships. Her professionalism and leadership continue to elevate customer satisfaction and contribute to TSP’s long-term success. BACK

Randy Boatright Accounting Manager BIO With a long tenure at TSP Manufacturing, Randy Boatright has become a cornerstone of the company’s financial operations. As Accounting Manager, Randy brings extensive experience and expertise in managing the company’s financial processes, ensuring accuracy, compliance, and efficiency. His deep knowledge of TSP Manufacturing’s business and culture has allowed him to contribute to the company’s growth and stability. Randy's dedication to maintaining strong financial controls and fostering a transparent financial environment supports the company’s long-term success and operational excellence. BACK