S-91375A369 3/8"-24 x 2 1/2" 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
• Precise Class 3A thread fit ensures tighter tolerances and reliable fastening in critical applications
• High-strength alloy steel construction with Rockwell C45 hardness provides exceptional durability and load-bearing capacity
• Hex drive design enables secure installation and high torque application without slippage
• Cup tip configuration creates positive locking action and prevents component damage during tightening
• Fine UNF threading offers superior vibration resistance and improved holding power
• Headless design allows for flush mounting in space-constrained applications

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional performance in demanding industrial settings where vibration resistance and precise positioning are critical. The 3/8"-24 UNF fine threading with Class 3A fit provides superior holding power in pulleys, gears, and collars, preventing loosening under dynamic loads. The hex drive design ensures reliable installation in hard-to-reach areas, while the cup tip creates positive engagement without damaging shaft surfaces. With Rockwell C45 hardness, this fastener maintains structural integrity in heavy-duty machinery, automotive assemblies, and precision equipment where repeated adjustments and high stress conditions are common.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit precision and UNF fine threading specifications. Complies with ASME B18.3 and ASTM F912 manufacturing standards. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements. Features right-hand thread direction with 2 1/2" length for versatile industrial applications.