S-91375A718 1/2"-13 x 1 3/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating, extending service life in demanding environments
• Superior holding power from Class 3A thread fit, ensuring vibration-resistant and reliable fastening
• High-strength performance with Rockwell C45 hardness, preventing deformation under heavy loads
• Secure installation and removal via 1/4" hex drive, allowing high torque application without slippage
• Effective component positioning with cup tip design, providing positive engagement and minimal surface damage
• Wide industrial compatibility with UNC coarse threads, facilitating quick assembly in various materials
• Regulatory compliance assurance meeting ASME B18.3 and ASTM F912 specifications for quality and safety

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering solutions where vibration resistance and corrosion protection are paramount. The Class 3A thread fit maintains precise tolerances in UNC coarse threading, preventing loosening in high-stress assemblies like machinery shafts, pulleys, and gear systems. The headless design allows flush mounting in confined spaces, while the cup tip securely bites into components without excessive penetration. With Rockwell C45 hardness, it withstands repeated adjustments in industrial set screw applications, from manufacturing equipment to automotive systems, ensuring long-term reliability where standard fasteners fail.

Specification Summary & Compliance

Manufactured to exact ASME B18.3 and ASTM F912 standards with Class 3A thread fit for superior dimensional accuracy. Features 1/2"-13 UNC coarse threads with right-hand direction and 1 3/4" length. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global industrial markets.