S-91274A171 10-32 x 3/8" ASME B18.3, ASTM A574, ASTM B117 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance provided by the zinc-flake coating, extending service life and maintaining integrity in harsh industrial environments.
• Precise Class 3A thread fit guarantees tight, secure fastening with minimal play, enhancing assembly accuracy and vibration resistance.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity and drive features through repeated use.
• Fully threaded design allows for maximum grip and adjustability along the entire length, providing versatile installation options.
• Compliance with ASME B18.3 and ASTM A574 standards ensures consistent quality, dimensional accuracy, and interoperability with other standardized components.
• RoHS 3 and REACH compliance meets environmental and safety regulations, making these screws suitable for global supply chains and sensitive applications.

Professional Applications & Engineering Value

This 10-32 UNF socket head cap screw is engineered to address critical challenges in precision assembly and heavy-duty machinery. The zinc-flake-coated alloy steel construction provides robust protection against corrosion and chemical exposure, ideal for automotive, aerospace, and industrial equipment where environmental durability is paramount. The fine UNF thread and Class 3A fit deliver superior clamping force and vibration resistance, preventing loosening in dynamic applications. With a 5/32" hex drive and standard socket head profile, it allows for high-torque installation in confined spaces, streamlining maintenance and reducing assembly time. These features make it a reliable choice for engineers seeking high-strength fasteners that combine longevity with regulatory compliance.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNF fine threads (10-32) for enhanced load distribution. Manufacturing conforms to ASME B18.3 and ASTM A574 specifications, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), meeting environmental and health safety requirements for industrial use.