S-91274A173 10-32 x 1/2" ASME B18.3, ASTM A574, ASTM B117 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc-flake coating, ideal for harsh industrial environments.
• Superior tensile strength of 170,000 psi ensures reliable performance under high-stress applications.
• Precise Class 3A thread fit provides secure, vibration-resistant fastening with minimal backlash.
• High Rockwell C37 hardness offers excellent wear resistance and long-term durability.
• Fully threaded UNF fine thread design allows for maximum grip and uniform load distribution.
• Hex socket drive (5/32") enables easy installation with standard tools in confined spaces.
• Compliance with RoHS 3 and REACH ensures environmental safety and regulatory acceptance.

Professional Applications & Engineering Value

This 10-32 UNF socket head cap screw is engineered for demanding applications where precision and reliability are critical. The zinc-flake-coated alloy steel construction provides robust protection against corrosion and chemical exposure, making it suitable for automotive, aerospace, and heavy machinery assemblies. The Class 3A thread fit and fine thread spacing deliver superior clamping force and vibration resistance, reducing the risk of loosening in dynamic loads. Its fully threaded design ensures consistent engagement, while the hex drive facilitates quick installation in tight spaces, enhancing assembly efficiency and maintenance workflows.

Specification Summary & Compliance

This screw features a 10-32 UNF thread with Class 3A precision tolerance, ensuring exact fit and performance. It complies with ASME B18.3 and ASTM A574 manufacturing standards, guaranteeing dimensional accuracy and material integrity. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and usage in global markets.