S-91375A706 1/2"-13 x 1/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating that protects against rust in demanding industrial environments
• Exceptional holding power thanks to the cup tip design that creates deep indentation for secure component positioning
• High-strength performance with Rockwell C45 hardness alloy steel construction for reliable, long-term fastening
• Precise thread engagement with Class 3A fit ensuring tight tolerances and reduced risk of loosening under vibration
• Easy installation and removal using standard 1/4" hex drive tools for efficient maintenance and adjustments
• Optimized for heavy-duty applications with coarse UNC threads that provide quick assembly and superior clamping force
• Compliance with industry standards including ASME B18.3 for consistent quality and performance reliability

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional engineering value in applications requiring secure component positioning against rotational forces. The headless design with hex drive allows for flush mounting in confined spaces while maintaining accessibility for adjustments. The cup tip configuration creates concentrated pressure points that prevent slippage in pulleys, gears, and collars. With Class 3A thread fit and coarse UNC threading, this fastener provides rapid installation and superior resistance to vibrational loosening in industrial machinery, automotive assemblies, and power transmission systems. The combination of Rockwell C45 hardness and corrosion-resistant coating ensures long-term reliability in demanding environments where precision alignment and durability are critical.

Specification Summary & Compliance

This set screw features precise 1/2"-13 UNC coarse threads with Class 3A fit for tight tolerance applications. Manufactured to ASME B18.3 specifications with Rockwell C45 hardness for consistent performance. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for industrial use. Dimensions include 1/4" length with 1/4" hex drive and right-hand thread direction for standard installation procedures.