S-91375A349 5/16"-24 x 7/16" 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 thread precision with Class 3A UNF fine threads for reliable, vibration-resistant connections.
• High-strength performance backed by Rockwell C45 hardness, ensuring durability under heavy loads.
• Secure, flush installation thanks to the headless design and cup tip, preventing component slippage.
• Easy installation and removal with a 5/32" hex drive, compatible with standard tools.
• Wide industrial compatibility with right-hand fine threads meeting common assembly requirements.
• Regulatory peace of mind through compliance with ASME, RoHS 3, and REACH standards.

Professional Applications & Engineering Value

This black-oxide alloy steel set screw is engineered to address critical challenges in precision assemblies, such as shaft collars, gears, and pulleys, where vibration resistance and corrosion protection are paramount. The Class 3A UNF fine thread ensures minimal backlash and superior clamping force, reducing maintenance needs in heavy-duty machinery. Its headless design with a cup tip provides a flush finish, preventing interference in tight spaces while the hex drive allows for straightforward torque application. Ideal for industrial automation, automotive, and aerospace applications, this fastener delivers consistent performance under stress, backed by rigorous material standards.

Specification Summary & Compliance

This set screw adheres to ASME B18.3 specifications with a Class 3A thread fit for precise dimensional accuracy. It features a 5/16"-24 UNF fine thread with right-hand direction, 7/16" length, and Rockwell C45 hardness for reliable mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for global industrial use.