S-91375A359 5/16"-24 x 2 1/2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide coating, ideal for harsh industrial environments and extending service life.
• Superior holding power from Class 3A thread fit, ensuring precise, vibration-resistant fastening in critical assemblies.
• High-strength durability with Rockwell C45 hardness, providing reliable performance under heavy loads and stress.
• Easy installation and removal using a 5/32" hex drive, allowing for efficient maintenance and adjustments.
• Secure component positioning with a cup tip design, minimizing slippage and damage to shafts or mating parts.
• Fine thread engagement with 5/16"-24 UNF threads, offering better tension control and resistance to loosening.
• Compliance with industry standards including ASME B18.3 and ASTM F912, ensuring consistent quality and safety.

Professional Applications & Engineering Value

This black-oxide alloy steel set screw is engineered to address common industrial challenges such as component misalignment and vibration-induced failures. The UNF fine threads and Class 3A fit provide tight tolerances for secure fastening in machinery, automotive, and aerospace applications, where precision is critical. The headless design and cup tip allow for flush mounting and effective gripping on rotating shafts or gears, reducing wear and maintenance needs. With Rockwell C45 hardness and corrosion-resistant coating, it delivers long-term reliability in demanding environments, supporting efficient assembly and reduced downtime.

Specification Summary & Compliance

This set screw adheres to Class 3A thread fit for high precision and meets ASME B18.3 and ASTM F912 specifications. It is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for industrial use.