S-92311A290 6-40 x 5/16" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance through fine UNF thread spacing that maintains secure positioning in demanding applications
• Exceptional corrosion resistance provided by 18-8 stainless steel construction for long-term reliability in harsh environments
• Precise thread engagement with Class 3A fit ensuring tight tolerances and reliable fastening performance
• Enhanced durability from Rockwell B80 hardness that resists wear and deformation under load
• Space-saving design with headless configuration ideal for confined spaces and flush mounting requirements
• Secure installation using standard 1/16" hex drive tools for consistent torque application and prevention of stripping
• Positive locking action from cup point tip that bites into mating surfaces for maximum holding power

Professional Applications & Engineering Value

These 6-40 UNF Class 3A set screws deliver exceptional engineering value in precision industrial applications where vibration resistance and reliable positioning are critical. The combination of 18-8 stainless steel material and fine thread spacing creates an optimal solution for machinery components, precision instruments, and automotive assemblies that experience constant motion or thermal cycling. The headless design with 1/16" hex drive allows for flush mounting in confined spaces while maintaining accessibility for maintenance. The cup point tip provides superior bite into shaft surfaces, preventing slippage in high-torque applications. This set screw configuration is particularly valuable in manufacturing equipment, robotics, and aerospace components where vibration-resistant fasteners must maintain precise alignment without loosening over time.

Specification Summary & Compliance

This set screw features precision 6-40 UNF threads with Class 3A fit for tight tolerance applications, manufactured in compliance with ASME B18.3 specifications. The product meets RoHS 3 (2015/863/EU) compliance standards and is REACH (EC 1907/2006) compliant, ensuring environmental responsibility and workplace safety. With right-hand thread direction and standardized 1/16" hex drive dimensions, these fasteners integrate seamlessly into existing industrial systems while maintaining Rockwell B80 hardness for consistent performance across temperature variations and mechanical stresses.