S-91375A077 2-56 x 1/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Maximum holding power with Class 3A thread fit ensuring tight, reliable connections in demanding applications
• Superior corrosion resistance thanks to the black-oxide finish on alloy steel, extending service life in harsh environments
• High durability and strength from Rockwell C45 hardness, resisting wear and deformation under heavy loads
• Easy installation and removal with the hex drive design, allowing secure tool engagement and efficient maintenance
• Secure fastening in right-hand coarse threads providing quick assembly and strong grip in various materials
• Precise positioning with cup tip enabling concentrated contact pressure for minimal component slippage
• Space-saving headless design ideal for confined spaces where protrusion is not feasible

Professional Applications & Engineering Value

This 2-56 UNC set screw is engineered to address critical industrial challenges, such as component slippage and vibration-induced loosening. Crafted from black-oxide alloy steel, it offers enhanced corrosion resistance, making it suitable for automotive, machinery, and electronics assemblies exposed to moisture or chemicals. The hex drive and coarse threads facilitate quick, secure fastening, reducing installation time while maintaining high torque resistance. With a cup tip, it concentrates force for reliable positioning in shafts, collars, and pulleys, ensuring long-term operational stability in heavy-duty applications.

Specification Summary & Compliance

This set screw adheres to precise Class 3A thread fit and UNC thread standards for consistent dimensional accuracy. It meets ASME B18.3 specifications, ensuring manufacturing quality and interoperability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it supports environmental safety and restricted substance control in industrial supply chains.