S-91375A676 7/16"-14 x 2 1/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating, extending service life in harsh industrial environments
• Superior holding power from Class 3A thread fit ensuring tight, secure fastening with minimal vibration loosening
• High-strength performance backed by Rockwell C45 hardness for reliable operation under heavy loads
• Optimized installation efficiency with 7/32" hex drive providing positive torque transmission and slip resistance
• Secure component positioning through cup tip design that creates consistent indentation on shafts
• Reliable coarse threading with 7/16"-14 UNC specification for quick assembly and reduced cross-threading risk
• Space-saving headless design allowing flush mounting where clearance is limited

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical performance in demanding applications where vibration resistance and corrosion protection are paramount. The Class 3A thread fit provides precise mechanical locking for power transmission components, pulleys, and collars, preventing costly downtime from fastener failure. Engineered with UNC coarse threads, it enables rapid installation in production environments while maintaining Rockwell C45 hardness for sustained clamping force. The headless configuration and cup tip work synergistically to create permanent positioning in machinery, automotive, and heavy equipment assemblies where reliability cannot be compromised.

Specification Summary & Compliance

Manufactured to exacting ASME B18.3 and ASTM F912 specifications with Class 3A thread fit tolerances for precision engagement. The 7/16"-14 UNC coarse thread configuration ensures compatibility with standard components. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations guarantees safe use across global industrial markets.