S-91375A644 3/8"-24 x 1/2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Maximum holding power through Class 3A thread fit and fine UNF threads for vibration resistance in high-stress applications
• Superior corrosion resistance with black-oxide coating protecting the alloy steel core in demanding industrial environments
• Exceptional durability from Rockwell C45 hardness rating maintaining structural integrity under repeated torque loads
• Secure installation with hex drive design allowing precise torque application and cup tip for concentrated surface contact
• Space-saving design as a headless set screw ideal for confined assemblies where protruding fasteners aren't feasible
• Reliable performance meeting ASME B18.3 specifications ensuring consistent quality and dimensional accuracy
• Environmental compliance with RoHS 3 and REACH regulations for safe use across global industrial markets

Professional Applications & Engineering Value

This 3/8"-24 UNF set screw delivers critical engineering solutions for permanent positioning and alignment applications where standard fasteners fail. The black-oxide alloy steel construction provides essential corrosion protection while maintaining the Rockwell C45 hardness needed to withstand rotational forces in pulley systems, gear assemblies, and coupling applications. The fine thread pitch creates more contact points along the mating surface, significantly reducing loosening from vibration - a common failure point in machinery and automotive components. The headless design with cup tip concentrates pressure on a small surface area, creating superior gripping force for shaft collars, knobs, and precision instruments without compromising the assembled components.

Specification Summary & Compliance

Manufactured to precise Class 3A thread fit tolerances for consistent engagement and optimal clamping force. Complies with ASME B18.3 dimensional standards ensuring interchangeability and reliability. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for hazardous substance restrictions. Features 3/8"-24 UNF fine threads with right-hand direction, 1/2" length, and 3/16" hex drive for standardized tool compatibility across industrial maintenance and manufacturing applications.