S-92311A607 5/16"-24 x 1 1/2" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
• Exceptional thread precision with Class 3A fit and UNF fine threads for secure, vibration-resistant fastening in critical assemblies.
• High mechanical strength backed by Rockwell B80 hardness, ensuring durability under load without stripping or deformation.
• Secure component locking via the cup point design, which bites into shafts for non-slip positioning in machinery and drives.
• Easy installation and removal with the 5/32" hex drive, allowing efficient torque application in confined spaces without head protrusion.
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for safe, industry-approved use.
• Optimized for fine-thread applications with 5/16"-24 right-hand threads, providing higher tensile strength and improved adjustment accuracy.

Professional Applications & Engineering Value

This 5/16"-24 UNF Class 3A set screw is engineered to address common industrial challenges like component slippage, corrosion-induced failure, and assembly vibration. The 18-8 stainless steel material offers excellent resistance to rust and chemicals, making it suitable for automotive, aerospace, and marine equipment where environmental exposure is a concern. The headless hex drive and cup point tip work synergistically to deliver flush-mount security and deep grip on rotating parts like pulleys, gears, and couplings. By utilizing fine thread spacing and a Class 3A thread fit, it minimizes backlash and maintains clamping force in high-stress applications, reducing maintenance needs and enhancing operational safety. Ideal for precision machinery, motor shafts, and conveyor systems, this screw ensures reliable performance where exact alignment and repeated adjustments are critical.

Specification Summary & Compliance

This set screw adheres to ASME B18.3 specifications, with precise Class 3A thread fit and UNF 5/16"-24 fine threads for tight tolerances. It is manufactured from 18-8 stainless steel with a Rockwell B80 hardness and features a right-hand thread direction, 1-1/2" length, and 5/32" hex drive. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for industrial use.