S-91410A943 5/16"-18 x 3" ASME B18.6.2 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with coarse UNC threads and cup point tip that bites deeply into materials for maximum resistance to vibration and loosening
• Exceptional durability provided by steel construction with Rockwell B80 hardness, ensuring long-term performance in demanding industrial environments
• Precise installation control through square head design with external square drive, allowing high torque application without stripping
• Reliable thread engagement with Class 2A thread fit that ensures consistent performance and easy assembly in manufacturing applications
• Regulatory compliance meeting ASME B18.6.2 specifications, RoHS 3, and REACH standards for safe use across global markets
• Versatile 3-inch length providing ample threading depth for secure fastening in various material thicknesses and applications
• Optimized for industrial use with right-hand thread direction and coarse thread spacing for quick installation in production environments

Professional Applications & Engineering Value

This 5/16"-18 UNC thread set screw delivers exceptional engineering value in demanding industrial applications where vibration resistance and secure positioning are critical. The steel construction with Rockwell B80 hardness provides the necessary strength to withstand mechanical stresses in machinery, automotive components, and manufacturing equipment. The cup point tip creates permanent dimples in mating surfaces, preventing rotational movement even under extreme vibration conditions. The square head design with external square drive enables high-torque installation without cam-out issues, making it ideal for assembly lines where reliability and speed are essential. These heavy-duty fasteners solve common engineering challenges of component slippage and maintenance requirements in pulley systems, gear assemblies, and shaft collars.

Specification Summary & Compliance

This set screw features precise Class 2A thread fit with 5/16"-18 UNC coarse threads ensuring proper engagement and consistent performance. Manufacturing complies with ASME B18.6.2 specifications for dimensional accuracy and quality standards. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting international environmental and safety requirements for industrial components. The square head measures 5/16" width with 1/4" height, providing optimal tool engagement for installation and removal operations.