S-91375A926 1"-8 x 5" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating that extends service life in demanding industrial environments
• Exceptional holding power achieved through Class 3A thread fit precision and Rockwell C45 hardness rating
• Optimized torque transmission via 9/16" hex drive that prevents tool slippage during installation
• Reliable positioning capability with cup tip design that creates secure contact points on mating surfaces
• Enhanced installation efficiency with coarse UNC threads that enable faster assembly in heavy-duty applications
• Consistent performance assurance through compliance with ASME B18.3 manufacturing specifications
• Environmental regulation compliance meeting RoHS 3 and REACH standards for global market acceptance

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering solutions for industrial machinery, automotive components, and heavy equipment assemblies. The 1"-8 UNC coarse thread configuration provides rapid installation in time-sensitive production environments while maintaining secure fastening integrity. The headless design with hex drive allows for flush mounting in confined spaces where protruding fastener heads would interfere with mechanical operation. The Rockwell C45 hardness rating ensures the screw maintains its structural integrity under high vibrational loads and repeated adjustment cycles. The cup tip creates concentrated pressure points that prevent component slippage in torque-critical applications, making this set screw ideal for securing gears, pulleys, and collars onto shafts in manufacturing and maintenance operations.

Specification Summary & Compliance

This heavy-duty fastener features 1"-8 UNC coarse threads manufactured to Class 3A tolerance for precise fitment in industrial applications. The screw meets ASME B18.3 specifications and ASTM F912 standards, ensuring consistent dimensional accuracy and mechanical properties. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental responsibility and global market acceptability. The 5" length provides ample engagement for secure fastening in demanding mechanical assemblies.