S-92311A115 4-40 x 1" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh environments
• Exceptional holding power achieved through Class 3A thread fit, ensuring secure fastening in demanding applications
• Optimized installation efficiency with hex drive design and 0.050" drive size for reliable torque transmission
• Enhanced surface engagement thanks to the cup tip design that provides excellent grip on contacted surfaces
• Reliable mechanical strength with Rockwell B80 hardness, offering consistent performance under stress
• Industry-standard compatibility through UNC coarse threading and 4-40 size for broad application versatility
• Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

This 4-40 UNC set screw delivers exceptional engineering value for precision assembly applications where space constraints and reliability are critical. The headless design allows for flush mounting in tight spaces, while the 18-8 stainless steel construction provides excellent corrosion resistance for demanding industrial environments. The Class 3A thread fit ensures superior holding power in machinery, automotive components, and electronic enclosures where vibration resistance is paramount. The cup tip configuration maximizes surface contact for secure positioning of gears, pulleys, and collars. With coarse UNC threading and Rockwell B80 hardness, this set screw maintains integrity under repeated adjustments and high-stress conditions, making it ideal for maintenance-critical applications across manufacturing, aerospace, and precision instrumentation sectors.

Specification Summary & Compliance

This precision set screw features exact 4-40 UNC coarse threading with Class 3A thread fit for superior dimensional accuracy and holding capability. The fastener maintains strict compliance with ASME B18.3 manufacturing specifications, ensuring consistent quality and performance. Environmental regulatory compliance is confirmed through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) adherence, making it suitable for global industrial applications. The combination of 1" length, right-hand thread direction, and 0.050" hex drive provides reliable installation characteristics while maintaining the mechanical properties required for demanding fastening applications.