S-91375A798 5/8"-11 x 1 1/2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating that protects against rust in demanding industrial environments
• Exceptional holding power from Class 3A thread fit ensuring maximum engagement and vibration resistance
• High-strength performance with Rockwell C45 hardness providing reliable durability under heavy loads
• Easy installation and removal with 5/16" hex drive design allowing for secure tool engagement
• Optimized torque transmission through cup tip design that concentrates force for superior gripping
• Reliable coarse threading with 5/8"-11 UNC pattern that resists loosening in high-vibration applications
• Space-saving headless design ideal for applications where protruding fastener heads are not feasible

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional engineering value in demanding industrial applications where vibration resistance and reliable positioning are critical. The Class 3A thread fit provides tighter tolerances than standard fasteners, ensuring secure engagement that withstands continuous operational stresses. The UNC coarse threads combined with the cup tip design create superior clamping force for permanent component positioning in machinery, pulleys, gears, and coupling assemblies. The headless configuration with hex drive allows for flush mounting in confined spaces while maintaining easy serviceability. Engineered for heavy-duty applications, this set screw maintains its integrity in high-stress environments where loosening could cause equipment failure or safety hazards.

Specification Summary & Compliance

This set screw features precision 5/8"-11 UNC coarse threads with Class 3A fit for superior dimensional accuracy and engagement. Manufactured to ASME B18.3 specifications and meeting ASTM F912 material requirements, it ensures consistent performance across industrial applications. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for use in regulated industries and international markets. With Rockwell C45 hardness and black-oxide surface treatment, it delivers both mechanical strength and corrosion protection in demanding operating conditions.