S-91375A714 1/2"-13 x 1 1/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in harsh industrial environments
• Maximum holding power achieved through Rockwell C45 hardness, preventing component slippage under heavy loads
• Precise thread engagement with Class 3A fit, ensuring reliable fastening without cross-threading issues
• Secure installation using 1/4" hex drive, providing excellent torque transmission and preventing tool slippage
• Enhanced grip capability from cup tip design, creating positive locking action on shaft surfaces
• Industry-standard compatibility with 1/2"-13 UNC coarse threads, fitting common industrial applications
• Space-saving headless design allowing flush mounting where clearance is limited

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional performance in demanding industrial applications where vibration resistance and permanent positioning are critical. The Class 3A thread fit provides precise tolerance control for secure fastening in machinery, automotive components, and power transmission systems. Engineered with coarse UNC threads, it offers rapid installation and superior resistance to loosening in high-vibration environments. The cup tip design creates concentrated pressure points that bite into shaft materials, preventing axial movement in pulleys, gears, and collars. With Rockwell C45 hardness, this set screw maintains its mechanical properties under sustained loads, making it ideal for permanent assembly applications where disassembly is not anticipated.

Specification Summary & Compliance

This 1/2"-13 UNC set screw features precise Class 3A thread fit according to ASME standards, ensuring dimensional accuracy and reliable performance. Manufactured to meet ASME B18.3 specifications and ASTM F912 material standards, with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The product maintains consistent 1-1/4" length and 0.5" thread diameter with coarse thread spacing for optimal performance in industrial fastening applications.