S-91375A288 12-24 x 1" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating protecting against rust in demanding industrial environments
• Exceptional holding power through Class 3A thread fit ensuring tight, secure fastening with minimal backlash
• High-strength durability with Rockwell C45 hardness maintaining structural integrity under heavy loads
• Secure installation via hex drive design providing positive torque transmission and preventing tool slippage
• Precise component positioning with cup tip design creating consistent indentation for reliable alignment
• Industry-standard compatibility with UNC coarse threads enabling quick assembly and interchangeability
• Headless space-saving design allowing flush mounting where clearance is limited

Professional Applications & Engineering Value

This 12-24 UNC set screw delivers critical engineering solutions for industrial applications requiring permanent, high-strength fastening. The black-oxide alloy steel construction provides superior corrosion protection in harsh operating conditions, while the Rockwell C45 hardness ensures the screw maintains its structural integrity under continuous vibration and heavy loads. The hex drive design enables precise torque application during installation, preventing cam-out and ensuring consistent clamping force. The cup tip creates a reliable indentation in shaft components, providing positive locking against rotational forces in pulley systems, gears, and collars. These features make it ideal for precision machinery, automotive assemblies, and manufacturing equipment where secure component positioning is critical to operational safety and performance.

Specification Summary & Compliance

This set screw features 12-24 UNC coarse threads with Class 3A thread fit for precise dimensional accuracy and superior engagement. Manufactured to ASME B18.3 specifications (ASTM F912) ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no restricted hazardous substances. The right-hand thread direction and 1" length provide standard compatibility across industrial applications requiring reliable set screw solutions.