S-91375A686 7/16"-20 x 1" 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 holding power from Rockwell C45 hardness, preventing deformation under high torque applications
• Precise thread engagement with Class 3A UNF fine threads, ensuring vibration-resistant fastening in critical assemblies
• Maximum torque transmission through 7/32" hex drive design, enabling secure installation without head protrusion
• Enhanced grip retention with cup point tip, providing superior bite into shaft materials for permanent positioning
• Regulatory compliance assurance meeting ASME B18.3, ASTM F912, RoHS 3, and REACH standards for global industrial use
• Optimized for confined spaces with headless 1" length design, ideal for applications requiring flush mounting

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering solutions for industrial applications requiring permanent component positioning. The Class 3A UNF fine threads provide superior resistance to vibrational loosening in machinery, power transmission systems, and precision equipment. The cup point design creates permanent dimples in shaft materials, ensuring zero slippage in high-torque environments. With Rockwell C45 hardness, these headless set screws maintain structural integrity under extreme mechanical stress while the black-oxide surface treatment prevents corrosion in humid or chemically aggressive environments. The 7/32" hex drive allows for high-torque installation in confined spaces, making these industrial set screws ideal for coupling, collar, and gear applications across manufacturing, automotive, and heavy equipment sectors.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications and ASTM F912 standards, this set screw maintains Class 3A thread fit precision with UNF 7/16"-20 fine threading. The 1" length and 0.438" thread diameter ensure dimensional accuracy for consistent performance. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety and unrestricted use in international markets.