S-92313A106 4-40 x 1/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments due to 316 stainless steel construction, ideal for chemical processing and marine applications
• Exceptional thread engagement and vibration resistance with Class 3A UNC coarse threads, ensuring reliable fastening under dynamic loads
• Optimized torque transmission through the 0.050" hex drive, preventing tool slippage and enabling precise installation in confined spaces
• Enhanced component protection with the cup tip design, minimizing surface damage while maintaining secure positioning
• Long-term mechanical reliability backed by Rockwell B80 hardness, providing consistent performance without deformation
• Broad industrial compliance meeting ASME B18.3 specifications and global environmental standards including RoHS 3 and REACH
• Space-saving headless design allowing flush mounting where protruding fasteners are impractical

Professional Applications & Engineering Value

Engineered for demanding industrial environments, this 316 stainless steel set screw delivers critical corrosion resistance where exposure to chemicals, moisture, or salt spray would compromise ordinary fasteners. The 4-40 UNC Class 3A thread configuration provides superior holding power in softer materials while resisting loosening under vibration—addressing common failure points in machinery, automotive assemblies, and electronic enclosures. The combination of hex drive and headless design enables installation in tightly spaced components where traditional screw heads would interfere. With Rockwell B80 hardness maintaining structural integrity under load, this set screw solves alignment and security challenges in precision equipment, manufacturing jigs, and permanent assemblies requiring reliable positioning without periodic retightening.

Specification Summary & Compliance

This set screw maintains Class 3A thread fit tolerances per UNC standards, ensuring precise engagement with mating components. Manufacturing complies with ASME B18.3 specifications for dimensional accuracy and performance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming restriction of hazardous substances. The right-hand coarse threads provide optimal installation efficiency while the 1/4" length and 0.112" thread diameter deliver standardized dimensional consistency across applications.