S-92505A634 1/4"-28 x 5/16" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black oxide coating that protects against rust in demanding industrial environments
• Precise thread engagement with Class 3A fit ensuring tight, reliable fastening in critical applications
• Exceptional mechanical strength from Rockwell C45 hardened alloy steel that withstands high torque and vibration
• Secure installation with hex drive design providing positive grip and preventing tool slippage during tightening
• Enhanced holding power from extended tip design that creates deeper penetration and superior resistance to loosening
• Industry-standard compliance meeting ASME B18.3 specifications for guaranteed dimensional accuracy and performance
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industries

Professional Applications & Engineering Value

This black oxide alloy steel set screw delivers exceptional engineering value in precision assembly applications where vibration resistance and reliable positioning are critical. The 1/4"-28 UNF fine threads with Class 3A fit provide superior engagement in tapped holes, preventing backlash in machinery components, pulleys, and collars. The extended tip design ensures maximum contact surface area, creating a permanent seating that resists rotational forces in high-vibration environments. Manufactured from hardened alloy steel with Rockwell C45 hardness, this headless fastener maintains its mechanical properties under sustained load, making it ideal for permanent installations in automotive, aerospace, and industrial equipment where disassembly is infrequent.

Specification Summary & Compliance

This precision set screw features 1/4"-28 UNF fine threads with Class 3A thread fit for exacting dimensional requirements. The 5/16" length with extended tip (0.156" diameter, 0.067" length) provides optimal engagement depth. Manufactured to ASME B18.3 specifications, this fastener ensures consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for use in regulated industries worldwide.