S-91375A933 1/2"-13 x 3/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance from the cup point design that bites into surfaces for secure, long-term positioning
• Exceptional strength and durability provided by alloy steel construction with Rockwell C45 hardness to withstand heavy loads
• Reliable corrosion protection through zinc plating, extending service life in demanding industrial environments
• Precise thread engagement with Class 3A fit and UNC coarse threads for quick assembly and reduced cross-threading risk
• Easy installation in confined spaces using the hex drive and headless design with 1/4" drive size
• Consistent performance assurance through compliance with ASME B18.3 manufacturing standards
• Environmental regulation compliance meeting RoHS 3 and REACH requirements for global supply chain integration

Professional Applications & Engineering Value

This 1/2"-13 UNC set screw delivers critical engineering solutions for industrial applications requiring permanent component positioning. The zinc plated alloy steel construction combined with Rockwell C45 hardness ensures reliable performance under vibration and heavy loads, preventing loosening in machinery, power transmission systems, and automotive assemblies. The hex headless cup point design provides maximum gripping force by concentrating pressure on a small contact area, making it ideal for securing gears, pulleys, and collars to shafts. With coarse thread spacing and Class 3A thread fit, installation is streamlined while maintaining precision alignment in manufacturing equipment, agricultural machinery, and material handling systems where vibration resistance is paramount.

Specification Summary & Compliance

This set screw features 1/2"-13 UNC coarse threads with Class 3A thread fit for precision tolerance, manufactured to ASME B18.3 specifications. The fastener maintains dimensional accuracy with 0.5" thread diameter, 3/8" length, and 1/4" hex drive size. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility, while the material meets ASTM F912 standards for consistent quality and performance in industrial applications.