S-91375A394 1/2"-13 x 7/16" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Exceptional holding power with Class 3A thread fit for secure, vibration-resistant fastening in demanding applications
• Superior corrosion resistance provided by black-oxide coating on alloy steel, extending service life in industrial environments
• Maximum grip and minimal slippage from the cup point design that bites into mating surfaces for reliable component positioning
• High mechanical strength with Rockwell C45 hardness, ensuring durability under heavy loads and repeated adjustments
• Easy installation and removal using standard 1/4" hex drive tools, reducing assembly time and maintenance efforts
• Space-saving headless design ideal for applications where protruding fastener heads are not feasible
• Reliable coarse threading (UNC 1/2"-13) for quick engagement and reduced cross-threading risks in production settings

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical performance in industrial machinery, automotive assemblies, and precision equipment where component shift under vibration is a major concern. The cup point design creates permanent indentation in shafts and collars, preventing rotational slip better than flat or oval points. Manufactured to ASME B18.3 specifications with Class 3A thread fit, it maintains tighter tolerances than commercial-grade fasteners, ensuring consistent clamping force in high-stress applications. The Rockwell C45 hardness provides optimal balance between toughness and machinability, resisting wear while allowing precise torque application during installation. These engineering features make it particularly valuable for securing gears, pulleys, and couplings where reliability directly impacts operational safety and equipment longevity.

Specification Summary & Compliance

This 1/2"-13 UNC set screw features coarse threading with precision Class 3A thread fit for superior engagement. Dimensions include 7/16" length with 1/4" hex drive configuration. Manufactured in compliance with ASME B18.3 standards where identified under ASTM F912. The product meets RoHS 3 (2015/863/EU) compliance requirements and is REACH (EC 1907/2006) compliant regarding SVHC substances as of January 17, 2022.