S-91375A645 3/8"-24 x 5/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating for extended service life in harsh industrial environments
• Exceptional holding power from Rockwell C45 hardness alloy steel that maintains strength under heavy loads
• Precise thread engagement with Class 3A UNF fine threads ensuring secure, vibration-resistant fastening
• Maximum torque transmission through 3/16" hex drive design for reliable installation and removal
• Enhanced grip capability with cup point tip that bites into materials for permanent positioning
• Space-saving headless design ideal for applications with limited clearance requirements
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for quality and safety

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional performance in demanding mechanical assemblies where vibration resistance and permanent positioning are critical. The 3/8"-24 UNF fine threads with Class 3A precision fit provide superior engagement in precision machinery, automotive components, and industrial equipment. The cup point design creates concentrated pressure that digs into shaft materials, preventing slippage in high-torque applications. With Rockwell C45 hardness and corrosion-resistant black-oxide finish, these headless set screws maintain integrity in challenging environments while the hex drive ensures straightforward installation in confined spaces.

Specification Summary & Compliance

This set screw features 3/8"-24 UNF fine threads with Class 3A thread fit for precision applications, manufactured to ASME B18.3 specifications (ASTM F912). The right-hand thread direction and 5/8" length provide standardized compatibility across industrial applications. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and material responsibility in global supply chains.