S-91375A575 5/16"-18 x 5/16" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide finish, extending service life in harsh industrial environments
• Exceptional thread precision with Class 3A fit ensures reliable, vibration-resistant fastening in critical assemblies
• High-strength durability from alloy steel with Rockwell C45 hardness, maintaining integrity under heavy loads
• Secure hex drive engagement with 5/32" drive size prevents stripping and allows high-torque installation
• Optimal component positioning with cup tip design that minimizes surface damage while providing firm grip
• Industry-standard compliance with ASME B18.3 specifications guarantees consistent performance and interchangeability
• Environmental regulation adherence through RoHS 3 and REACH compliance for global supply chain compatibility

Professional Applications & Engineering Value

This 5/16"-18 UNC set screw delivers critical engineering solutions for industrial applications where vibration resistance and positioning accuracy are paramount. The black-oxide alloy steel construction provides superior protection against corrosion while maintaining the Rockwell C45 hardness needed for repeated adjustments. The Class 3A thread fit ensures precise engagement with mating components, eliminating play in machinery assemblies, power transmission systems, and precision equipment. The headless design with hex drive allows installation in confined spaces while the cup tip securely grips shafts and collars without causing permanent surface deformation. These features make it ideal for demanding applications in automotive, manufacturing, and aerospace industries where reliability and repeatability are essential.

Specification Summary & Compliance

This set screw features 5/16"-18 UNC coarse threads with Class 3A thread fit for precision tolerance. Manufactured to ASME B18.3 specifications (ASTM F912) with right-hand thread direction and 5/16" length. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.