S-91410A789 5/8"-11 x 1 3/4" ASME B18.6.2 Set Screws

Key Features & Benefits at a Glance

• Superior torque transmission with a square head design (5/8" width, 31/64" height) for reliable tightening in demanding applications
• Enhanced durability and wear resistance thanks to Rockwell B80 hardness steel construction
• Secure and precise fastening with Class 2A coarse UNC threads ensuring consistent fit and reduced cross-threading risks
• Optimized for high-vibration environments through the cup tip design that minimizes loosening under dynamic loads
• Simplified installation and removal using standard external square drive tools for efficient maintenance
• Compliance with industry standards including ASME B18.6.2 for dimensional accuracy and performance reliability
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance for global industrial use

Professional Applications & Engineering Value

This 5/8"-11 UNC steel square head set screw delivers exceptional holding power in heavy-duty machinery, automotive assemblies, and construction equipment where vibration resistance is critical. The coarse thread design with Class 2A fit enables quick installation while maintaining precise alignment, reducing assembly time in production lines. Manufactured from hardened steel with Rockwell B80 rating, it withstands repeated torque applications without stripping or deformation. The cup tip creates concentrated surface pressure, preventing shaft slippage in pulley systems, gear hubs, and coupling applications. Ideal for maintenance operations requiring external square drive compatibility with standard industrial tools.

Specification Summary & Compliance

This set screw maintains Class 2A thread tolerances per UNC standards with 5/8"-11 coarse threading and right-hand direction. Manufacturing conforms to ASME B18.6.2 specifications for dimensional consistency. The product is certified RoHS 3 (2015/863/EU) and REACH compliant, meeting international environmental regulations for industrial components.