S-91677A138 5/8"-11 x 1" Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide finish protecting against rust in demanding industrial environments
• Maximum holding power through Rockwell C32 hardness alloy steel construction that resists deformation under heavy loads
• Precise thread engagement with Class 2A thread fit ensuring consistent, reliable fastening in UNC coarse thread applications
• Enhanced gripping capability from the ball tip design with Rockwell C60 hardness that minimizes component damage while maintaining secure positioning
• Easy installation and removal using the 5/16" hex drive that provides excellent torque transmission without head protrusion
• Reliable right-hand coarse threading that resists loosening from vibration in machinery and equipment applications
• Environmental compliance assurance meeting RoHS 3 and REACH regulations for safe use across global markets

Professional Applications & Engineering Value

This 5/8"-11 UNC set screw delivers exceptional engineering value in applications requiring secure component positioning without head protrusion. The black-oxide alloy steel construction provides superior corrosion protection while maintaining the Rockwell C32 hardness needed for high-strength fastening. The precision Class 2A thread fit ensures consistent engagement in UNC coarse thread applications, preventing loosening from vibration in machinery, automotive assemblies, and industrial equipment. The ball tip design with Rockwell C60 hardness creates concentrated contact pressure that securely locks components without damaging mating surfaces, making it ideal for precision shaft collars, gears, and pulley systems where repeated adjustments are necessary.

Specification Summary & Compliance

This set screw features 5/8"-11 UNC coarse threads with Class 2A thread fit tolerance for precise engagement in industrial applications. The 1" length and 0.625" thread diameter provide optimal fastening dimensions for various assembly requirements. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and global market acceptance. The right-hand thread direction and headless design with 5/16" hex drive offer standardized installation across equipment and machinery applications.