S-91375A905 3/8"-16 x 1/2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating that protects against rust and extends service life in harsh industrial environments
• Exceptional holding power from Class 3A thread fit ensuring tight, secure fastening with minimal vibration loosening
• High-strength durability with Rockwell C45 hardness alloy steel construction that withstands heavy loads and repeated adjustments
• Easy installation and removal using the 3/16" hex drive that provides positive torque transfer without cam-out
• Reliable positioning with cup tip design that creates consistent indentation for precise component alignment
• Broad compatibility with UNC coarse threads that engage quickly and resist cross-threading in various applications
• Regulatory compliance meeting multiple industry standards for quality assurance and environmental safety

Professional Applications & Engineering Value

This zinc plated alloy steel set screw delivers critical engineering solutions for industrial applications where vibration resistance and positioning accuracy are paramount. The Class 3A thread fit provides superior engagement with mating components, preventing loosening under dynamic loads while the cup tip creates secure indentation points on shafts and collars. Manufactured from high-strength alloy steel with Rockwell C45 hardness, this headless set screw maintains structural integrity in high-stress environments. The 3/8"-16 UNC coarse thread configuration ensures rapid installation and reliable performance in pulleys, gears, and coupling applications across manufacturing, automotive, and heavy equipment sectors.

Specification Summary & Compliance

This set screw features precision 3/8"-16 UNC Class 3A threads with coarse thread spacing and right-hand thread direction. Manufacturing complies with ASME B18.3 specifications where identified as ASTM F912. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. Dimensions include 1/2" length, 0.375" thread diameter, and 3/16" hex drive size with cup tip configuration.