S-91375A792 5/8"-11 x 3/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in harsh industrial environments
• Exceptional thread precision with Class 3A fit for secure, vibration-resistant fastening in critical assemblies
• High-strength durability from alloy steel construction with Rockwell C45 hardness for heavy-duty applications
• Optimal torque transmission through 5/16" hex drive design, preventing tool slippage during installation
• Enhanced gripping power with cup tip configuration that bites into mating surfaces without damaging components
• Space-saving headless profile ideal for confined spaces where conventional fastener heads would interfere
• Reliable coarse threading (UNC 5/8"-11) for faster installation and reduced cross-threading risks

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical performance in demanding industrial applications where vibration resistance and precise component positioning are paramount. The Class 3A thread fit ensures minimal backlash in machinery assemblies, while the cup tip design provides superior clamping force without marring shaft surfaces. Engineered with Rockwell C45 hardness, this hex drive set screw maintains its mechanical properties under repeated stress cycles, making it ideal for permanent positioning in pulleys, gears, and collars. The right-hand UNC coarse thread facilitates quick installation in production environments, and the headless configuration enables flush mounting in space-constrained assemblies. This combination of precision threading, surface treatment, and material strength addresses common challenges of component slippage, corrosion-induced failure, and installation inefficiency in industrial maintenance and OEM applications.

Specification Summary & Compliance

This precision fastener features 5/8"-11 UNC coarse threads with Class 3A tolerance for exacting fit requirements. Manufacturing complies with ASME B18.3 specifications and ASTM F912 material standards. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting the latest environmental regulations for industrial components. With a standardized hex drive size of 5/16" and consistent 3/4" length, this set screw ensures interoperability with industry-standard tools and assembly processes.