S-91375A725 1/2"-13 x 3 1/2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, ideal for harsh industrial environments and extended service life.
• Exceptional holding power due to Class 3A thread fit, ensuring precise, vibration-resistant fastening in critical assemblies.
• High-strength durability from alloy steel and Rockwell C45 hardness, providing reliable performance under heavy loads.
• Easy installation and removal with a 1/4" hex drive, allowing efficient maintenance and adjustments without slippage.
• Secure component positioning with a cup tip design, preventing damage to shafts and improving grip in set screw applications.
• Broad compliance with ASME B18.3, RoHS 3, and REACH standards, ensuring safety and regulatory acceptance in global markets.
• Optimized for coarse UNC threads, enabling quick assembly and reduced cross-threading risks in industrial machinery.

Professional Applications & Engineering Value

This black-oxide alloy steel set screw is engineered to address common industrial challenges such as component slippage and corrosion-induced failure. Its headless hex drive and Class 3A UNC threads deliver precise alignment and high clamping force, making it ideal for securing gears, pulleys, and collars in machinery and automotive systems. The cup tip minimizes surface damage while enhancing grip, and the Rockwell C45 hardness ensures long-term reliability under dynamic loads. Compliant with ASME B18.3 and environmental regulations, it offers a robust solution for engineers seeking durability and compliance in demanding applications.

Specification Summary & Compliance

This set screw features a 1/2"-13 UNC coarse thread with Class 3A fit for tight tolerances, and is manufactured from alloy steel with a black-oxide finish. It conforms to ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental safety and performance reliability.