S-90289A791 5/8"-11 x 5/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in harsh industrial environments
• Exceptional holding power from Class 3A thread fit ensuring precise, vibration-resistant fastening
• Enhanced torque transmission through 5/16" hex drive design for secure installation and removal
• Reliable anti-loosening performance with serrated locking mechanism and cup tip for permanent positioning
• Optimized material strength from alloy steel with Rockwell C45 hardness for heavy-duty applications
• Industry-standard compatibility with 5/8"-11 UNC coarse threads meeting common assembly requirements
• Headless space-saving design allowing flush mounting where clearance is limited

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical performance in demanding industrial settings where vibration resistance and permanent positioning are paramount. The Class 3A thread fit provides tighter tolerances than standard fasteners, eliminating play in precision machinery, rotating shafts, and power transmission systems. The combination of serrations for locking and cup tip design creates exceptional bite into mating surfaces, preventing component slippage under extreme loads. Engineered with Rockwell C45 hardness, it maintains structural integrity in high-stress applications while the right-hand UNC coarse threads ensure quick installation in manufacturing and maintenance operations. Ideal for securing gears, pulleys, and collars in automotive, aerospace, and heavy equipment industries.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit for superior dimensional accuracy. Features 5/8"-11 UNC coarse threads with right-hand direction and 0.625" thread diameter. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.