S-92785A503 4-40 x 5/16" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Maximum holding power achieved through Class 3A thread fit precision and 90° cone point design
• Exceptional durability with Rockwell B80 hardness for long-term performance under vibration and load
• Secure installation using standard 0.050" hex drive tools, preventing stripping and ensuring consistent torque
• Reliable positioning with headless design and cone point tip for permanent component alignment
• Broad compatibility with UNC coarse threads (4-40) for quick assembly in various industrial applications
• Regulatory compliance meeting ASME B18.3 standards and environmental regulations for global supply chain integration

Professional Applications & Engineering Value

This 4-40 UNC set screw delivers critical engineering solutions for permanent component fixation in machinery, automotive, and precision equipment. The 18-8 stainless steel material provides excellent corrosion resistance in demanding environments, while the 90° cone point creates deep penetration for vibration-resistant locking. The hex drive (0.050") ensures reliable torque transmission without cam-out, and the headless design maintains clean profiles in confined spaces. With Class 3A thread fit precision and coarse UNC threading, this fastener offers rapid assembly and superior holding strength for shafts, collars, and mechanical joints where reliability is paramount.

Specification Summary & Compliance

Manufactured to exact ASME B18.3 specifications with Class 3A thread fit tolerance for precision engagement. Features 4-40 UNC coarse threads with right-hand direction and 5/16" length. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors while maintaining consistent dimensional accuracy and mechanical performance.