S-91375A367 3/8"-24 x 7/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in demanding industrial environments
• Exceptional thread precision with Class 3A fit ensures reliable, vibration-resistant connections in critical assemblies
• Optimized torque transmission through hex drive design prevents tool slippage and maintains fastener integrity
• Enhanced holding power with cup tip design creates concentrated pressure points for secure component positioning
• Consistent mechanical performance from Rockwell C45 hardness maintains dimensional stability under heavy loads
• Regulatory compliance assurance meets ASME B18.3 specifications and international environmental standards
• Space-saving headless design enables flush mounting in confined assembly applications

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering advantages in precision manufacturing and heavy machinery applications. The 3/8"-24 UNF fine threads with Class 3A tolerance provide exceptional engagement in threaded components, resisting loosening from vibration and thermal cycling. The hex drive configuration ensures maximum torque application without cam-out, while the cup tip creates localized deformation for permanent shaft-hub connections. Particularly valuable in industrial equipment, power transmission systems, and precision instruments, this fastener solves common challenges of component slippage, corrosion-induced failure, and assembly space constraints. The combination of Rockwell C45 hardness and controlled surface treatment maintains dimensional stability while preventing galling during installation.

Specification Summary & Compliance

Manufactured to exacting ASME B18.3 specifications with Class 3A thread fit for superior dimensional accuracy. The UNF fine thread profile (3/8"-24) ensures optimal engagement in precision applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, alongside material certification to ASTM F912 standards. The black-oxide surface treatment provides consistent corrosion protection while maintaining the mechanical properties of the underlying alloy steel substrate.