S-91375A459 3/4"-10 x 5" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit for precise, vibration-resistant fastening in demanding applications
• Enhanced corrosion resistance through black-oxide coating, extending service life in harsh industrial environments
• High-strength durability from alloy steel with Rockwell C45 hardness, resisting deformation under heavy loads
• Secure, non-slip engagement with cup tip design that bites into surfaces, preventing component slippage
• Easy installation and removal using the 3/8" hex drive, allowing high-torque application with standard tools
• Reliable coarse threading with UNC 3/4"-10 specification for quick assembly and reduced cross-threading risks
• Space-saving headless design ideal for applications where protruding fastener heads are not feasible

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional performance in heavy-duty mechanical systems where vibration resistance and permanent positioning are critical. The cup tip design creates positive locking action by concentrating pressure on a small contact area, preventing shaft or component movement in pulleys, gears, and collars. With UNC coarse threading and Class 3A fit, installation is streamlined while maintaining tight tolerances for precision machinery. The 5" length provides sufficient engagement for deep mounting applications, while the hex drive accommodates high torque requirements without stripping. Ideal for manufacturing equipment, automotive assemblies, and industrial machinery where reliable set screws must withstand continuous operational stresses.

Specification Summary & Compliance

This set screw features 3/4"-10 UNC coarse threads with Class 3A fit for superior dimensional accuracy. Manufactured to ASME B18.3 specifications and ASTM F912 standards, ensuring consistent quality and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The right-hand thread direction and Rockwell C45 hardness provide reliable mechanical properties for industrial fastening applications.