S-92311A291 6-40 x 1/2" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance with Class 3A thread fit for maximum holding power in demanding applications
• Excellent corrosion resistance provided by 18-8 stainless steel construction for long-term reliability
• Secure installation and removal with 1/16" hex drive that prevents tool slippage and damage
• Enhanced grip and positioning through cup point design that bites into mating surfaces
• Optimized mechanical strength with Rockwell B80 hardness for durable performance under load
• Precise fine threading (UNF) ensures tight fit and superior clamping force distribution
• Headless design allows for flush mounting in space-constrained assemblies

Professional Applications & Engineering Value

This 6-40 UNF Class 3A set screw delivers exceptional engineering value in industrial applications where vibration resistance and corrosion protection are critical. The 18-8 stainless steel construction combined with fine threading provides superior holding power in precision machinery, automotive components, and electronic enclosures. The headless design with cup point creates permanent positioning in shafts, collars, and pulleys without protruding hardware. The 1/16" hex drive ensures reliable installation in confined spaces while maintaining torque integrity. These set screws solve common industrial challenges of component slippage, material degradation, and assembly space limitations through their optimized thread form and material properties.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit for precision tolerance. Features 6-40 UNF fine threads with right-hand direction and 1/2" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The 18-8 stainless steel material provides consistent performance with Rockwell B80 hardness rating for mechanical durability.