S-91375A636 3/8"-16 x 3" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Maximum holding power with Rockwell C45 hardness alloy steel construction, resisting deformation under high stress
• Precise, secure positioning thanks to the Class 3A thread fit, minimizing backlash and ensuring reliable assembly
• Superior torque transmission and strip-resistance from the 3/16" hex drive, allowing for high installation forces
• Enhanced grip and minimal surface damage from the cup tip design, ideal for repeated adjustments on shafts and collars
• Flush, space-saving installation with its headless design, perfect for confined spaces and rotating components
• Broad compatibility with 3/8"-16 UNC coarse threads, facilitating quick assembly and disassembly in common industrial applications
• Long-term reliability ensured by compliance with ASME B18.3 and ASTM F912 specifications for dimensional and mechanical integrity

Professional Applications & Engineering Value

This alloy steel set screw is engineered to solve critical fastening challenges in demanding environments. Its high-strength material and Rockwell C45 hardness prevent stripping and wear, making it ideal for securing pulleys, gears, and collars on rotating shafts where vibration is a concern. The UNC coarse thread and Class 3A thread fit provide excellent engagement and holding power, reducing the risk of loosening in heavy-duty industrial applications. The headless design with a hex drive allows for flush mounting, eliminating protrusions in machinery. The cup tip concentrates force for a firm grip without excessive marring, perfect for precision positioning in assembly lines, automotive components, and power transmission systems. This combination delivers reliable, repeatable performance where failure is not an option.

Specification Summary & Compliance

This set screw features a 3/8"-16 UNC coarse thread with a Class 3A thread fit for precise, tight-tolerance assembly. It is manufactured in accordance with ASME B18.3 and ASTM F912 specifications, ensuring dimensional accuracy and mechanical performance. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for use in regulated industries.