S-92311A277 4-48 x 3/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-term reliability in harsh environments
• Exceptional holding power through Class 3A thread fit ensuring tight, secure fastening in precision assemblies
• Optimized torque transmission with hex drive design preventing tool slippage during installation
• Enhanced grip and anti-rotation from cup point tip design that bites into mating surfaces
• Consistent performance maintained through Rockwell B80 hardness for durable, deformation-resistant threads
• Reliable fine threading with 4-48 UNF specification providing superior vibration resistance
• Broad compliance coverage meeting ASME B18.3 standards plus RoHS 3 and REACH environmental regulations

Professional Applications & Engineering Value

This 4-48 UNF set screw delivers critical engineering solutions where space constraints and vibration resistance are paramount. The 18-8 stainless steel composition provides excellent corrosion resistance for machinery operating in humid or chemically aggressive environments. The fine thread UNF specification combined with Class 3A thread fit ensures precise engagement in threaded holes, minimizing the risk of stripping while maintaining consistent clamping force. The hex headless design allows for flush mounting in confined spaces, while the cup point creates permanent indentation in shafts and collars to prevent rotational slippage. These features make it ideal for precision instruments, automotive components, and industrial equipment where reliable positioning and vibration resistance are critical to operational integrity.

Specification Summary & Compliance

Manufactured to exacting ASME B18.3 specifications with Class 3A thread fit tolerance for superior dimensional accuracy. The 4-48 UNF fine threads provide precise engagement with mating components. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures safe use across various industries. Thread direction: right hand; Drive size: 0.050" hex; Length: 3/8"; Material hardness: Rockwell B80.