S-92311A289 6-40 x 1/8" 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 tight, secure fastening in precision assemblies
• Optimal torque transmission via 1/16" hex drive design that prevents stripping and enables reliable installation
• Enhanced material durability with Rockwell B80 hardness providing excellent resistance to wear and deformation
• Precise component positioning using the cup tip design that creates positive engagement on shaft surfaces
• Reliable fine thread performance with UNF 6-40 specification delivering superior vibration resistance in dynamic applications
• Space-saving headless design allowing flush mounting where clearance is limited without compromising functionality

Professional Applications & Engineering Value

This 6-40 UNF Class 3A set screw delivers critical engineering solutions for industrial applications requiring precise component positioning and secure fastening. The 18-8 stainless steel construction provides excellent corrosion resistance, making it ideal for machinery exposed to moisture, chemicals, or outdoor elements. The fine thread spacing and right-hand thread direction work in conjunction with the cup tip design to create maximum holding power against rotational forces and vibration, preventing loosening in dynamic systems. The headless hex drive configuration allows for flush installation in confined spaces while maintaining high torque capability. These features make this set screw particularly valuable in precision equipment, automotive assemblies, and manufacturing fixtures where reliability and dimensional accuracy are paramount.

Specification Summary & Compliance

This precision fastener maintains Class 3A thread fit tolerances according to UNF 6-40 specifications, ensuring exact dimensional accuracy for critical applications. Manufactured in compliance with ASME B18.3 standards, the set screw demonstrates consistent quality and performance reliability. The product meets RoHS 3 (2015/863/EU) compliance for restricted hazardous substances and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety. With a thread diameter of 0.138" and length of 1/8", this hex drive set screw provides engineers with a fully documented, specification-compliant fastening solution.