S-91375A616 3/8"-16 x 5/16" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in demanding industrial environments
• Exceptional holding power thanks to Class 3A thread fit precision, ensuring vibration-resistant fastening
• High-strength durability from Rockwell C45 hardened alloy steel construction, resisting deformation under heavy loads
• Easy installation and removal with hex drive design, allowing high torque application without stripping
• Secure positioning with cup tip design that creates consistent pressure points on shafts and collars
• Reliable coarse threading (UNC 3/8"-16) for quick assembly and reduced cross-threading risks
• Compliance with major industrial standards including ASME B18.3, ensuring interchangeability and quality consistency

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical performance where permanent positioning and vibration resistance are paramount. The Class 3A thread fit maintains precise tolerances in high-cycle applications, preventing loosening in machinery, motor assemblies, and power transmission systems. The hex drive accommodates standard tools for secure installation in confined spaces, while the cup tip concentrates clamping force without damaging shaft surfaces. Engineered for industrial set screw applications requiring repeated adjustment under stress, this component meets rigorous ASME B18.3 specifications for reliability in manufacturing equipment, automotive systems, and heavy machinery.

Specification Summary & Compliance

Manufactured to ASME B18.3 standards with Class 3A thread fit precision and UNC 3/8"-16 coarse threads. The black-oxide alloy steel construction achieves Rockwell C45 hardness for optimal strength. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.