S-91251A873 6-32 x 3" ASTM A574 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 from the black-oxide finish on alloy steel, extending service life in various industrial environments without compromising integrity.
• Precise Class 3A thread fit provides consistent engagement and vibration resistance, minimizing loosening in machinery and equipment assemblies.
• High hardness rating (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated installation and removal cycles.
• Partially threaded design allows for secure clamping of materials while leaving unthreaded sections for added shear strength and alignment stability.
• Standard UNC coarse threads enable quick assembly and disassembly, improving efficiency in maintenance and production line operations.
• Hex socket drive compatibility with 7/64" tools ensures easy installation in confined spaces, reducing assembly time and labor costs.

Professional Applications & Engineering Value

Engineered for industrial fastening where reliability is non-negotiable, these socket head cap screws leverage black-oxide alloy steel construction to combat corrosion in harsh operational environments. The 6-32 UNC thread with coarse spacing delivers rapid installation in metal fabrications, machinery frames, and automotive components, while the partially threaded rod type ensures optimal load distribution across joined materials. With a 3-inch length and Class 3A thread fit, they provide exceptional clamp load retention in vibrating systems, preventing joint failure in high-strength applications like precision equipment and structural assemblies. This combination of material durability and thread design directly addresses common issues of fastener loosening and corrosion-induced degradation.

Specification Summary & Compliance

This socket head cap screw adheres to inch system dimensions with a Class 3A thread fit for superior precision in UNC coarse threads. Manufacturing follows ASTM A574 specifications, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for global industrial markets with strict environmental and safety standards.