S-91385A365 3/8"-24 x 3/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with nylon patch thread locker that maintains secure fastening from -50°F to 250°F, preventing loosening in dynamic industrial environments
• Superior corrosion protection through black-oxide coating on alloy steel, extending service life in demanding applications
• Precise thread engagement with Class 3A UNF fine threads ensuring tight, reliable connections in critical assemblies
• High-strength performance with Rockwell C45 hardness rating, providing exceptional durability under heavy loads
• Space-saving design as a headless set screw with hex drive, ideal for confined spaces where clearance is limited
• Secure component positioning with cup tip design that creates positive engagement on mating surfaces
• Industry-standard compliance meeting ASME B18.3 specifications for guaranteed dimensional accuracy and performance

Professional Applications & Engineering Value

This 3/8"-24 UNF Class 3A set screw delivers exceptional engineering value in industrial applications where vibration resistance and precise component positioning are critical. The black-oxide alloy steel construction provides superior corrosion protection while maintaining the material's inherent strength. The integrated nylon patch thread locker effectively prevents back-out in high-vibration environments, eliminating the need for separate locking compounds. The headless hex drive design allows installation in tight spaces where traditional fastener heads would interfere, while the cup tip ensures positive engagement on shafts, collars, and other rotating components. These features combine to solve common industrial challenges of component slippage, maintenance frequency, and space constraints in machinery assembly and power transmission systems.

Specification Summary & Compliance

This set screw features 3/8"-24 UNF fine threads with Class 3A thread fit for precise dimensional accuracy and tight tolerances. Manufactured to ASME B18.3 specifications and ASTM F912 standards, ensuring consistent quality and performance. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety regulations for industrial components.