S-91381A532 1/4"-20 x 3/16" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior surface protection with brass soft tip that prevents damage to mating components during installation
• Exceptional holding power achieved through Class 3A thread fit precision and Rockwell C28 hardness rating
• Enhanced corrosion resistance from black-oxide coating on alloy steel construction
• Secure installation in confined spaces with headless design and 1/8" hex drive compatibility
• Reliable fastening performance with coarse UNC threading for quick assembly and vibration resistance
• Industry-standard compatibility through ASME B18.3 specification compliance
• Environmental regulation compliance meeting RoHS 3 and REACH requirements for global applications

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering solutions for industrial applications requiring maximum holding power without surface damage. The brass soft tip provides superior protection for precision components while the Class 3A thread fit ensures tight tolerances and vibration resistance in demanding environments. The headless design with 1/8" hex drive allows installation in confined spaces commonly found in machinery, automotive, and manufacturing equipment. The coarse UNC threading enables rapid assembly while maintaining secure fastening, making it ideal for applications where reliable set screw performance is critical to operational safety and equipment longevity.

Specification Summary & Compliance

Manufactured to ASME B18.3 standards with Class 3A thread fit precision for superior dimensional accuracy. Features 1/4"-20 UNC coarse thread spacing with right-hand thread direction. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. The black-oxide alloy steel construction with Rockwell C28 hardness rating provides consistent performance in demanding fastening applications.