S-91375A791 5/8"-11 x 5/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Exceptional holding power with cup point design that bites into mating surfaces for secure, permanent fastening in high-vibration environments
• Superior corrosion resistance from black-oxide coating on alloy steel, providing durable protection against rust and extending service life
• Precision thread engagement with Class 3A fit ensuring tight tolerances and reliable performance in critical assemblies
• High-strength construction with Rockwell C45 hardness offering excellent resistance to wear and deformation under heavy loads
• Easy installation and removal through 5/16" hex drive that accommodates standard tools while maintaining headless profile
• Optimized for industrial use with coarse UNC threads enabling quick assembly and reduced cross-threading risks
• Regulatory compliance assurance meeting ASME B18.3 specifications and international environmental standards

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional engineering value in demanding industrial applications where vibration resistance and permanent positioning are critical. The headless design with hex drive provides flush mounting capabilities while maintaining accessibility for maintenance. Engineered with Class 3A thread fit and coarse UNC threading, it ensures rapid installation in production environments while maintaining precision alignment. The cup point configuration creates concentrated pressure that securely locks components against shafts, collars, and hubs, preventing slippage in high-torque transmission systems. Ideal for machinery, automotive, and heavy equipment applications, this 5/8"-11 set screw combines the strength of Rockwell C45 hardened alloy steel with corrosion-resistant black-oxide treatment for long-term reliability in challenging operating conditions.

Specification Summary & Compliance

This set screw maintains precision Class 3A thread tolerances with 5/8"-11 UNC coarse thread spacing and right-hand thread direction. Manufactured to ASME B18.3 specifications where identified as ASTM F912, ensuring consistent quality and dimensional accuracy. The product is fully compliant with RoHS 3 (2015/863/EU) environmental directives and REACH (EC 1907/2006) regulations regarding substance restrictions, meeting the latest compliance standards for industrial components.