S-91410A788 5/8"-11 x 1 1/4" ASME B18.6.2 Set Screws

Key Features & Benefits at a Glance

• Superior torque transmission with square head design for secure installation and removal in high-torque applications
• Exceptional holding power through Rockwell B80 hardness steel construction that resists deformation under stress
• Reliable coarse threading with UNC 5/8"-11 pattern provides faster installation and better performance in softer materials
• Precise thread engagement with Class 2A fit ensures consistent performance and reduces cross-threading risks
• Enhanced grip and security from cup tip design that creates positive seating and prevents component movement
• Industry-standard compatibility meeting ASME B18.6.2 specifications for guaranteed dimensional accuracy
• Environmental compliance assurance with RoHS 3 and REACH compliance for global industrial applications

Professional Applications & Engineering Value

This 5/8"-11 UNC steel square head set screw delivers critical engineering solutions for demanding industrial applications where vibration resistance and permanent positioning are paramount. The coarse thread design combined with Class 2A thread fit provides optimal engagement in machinery components, pulleys, gears, and couplings, preventing loosening under dynamic loads. The square head configuration with external drive allows for high-torque application using standard wrenches, while the cup tip creates concentrated pressure points that bite into shaft materials, eliminating slippage in power transmission systems. Manufactured from steel with Rockwell B80 hardness, this fastener maintains its structural integrity in heavy-duty mechanical assemblies, making it ideal for manufacturing equipment, agricultural machinery, and industrial automation systems where reliability cannot be compromised.

Specification Summary & Compliance

This set screw features precise inch measurement specifications with 5/8"-11 UNC coarse threads and Class 2A thread fit tolerance for consistent performance. Manufacturing complies with ASME B18.6.2 standards ensuring dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance for restricted substance control and REACH (EC 1907/2006) compliance for chemical safety, making it suitable for global industrial markets with stringent environmental regulations.