S-91375A687 7/16"-20 x 1 1/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating for extended service life in demanding industrial environments
• Exceptional thread precision with Class 3A fit ensures secure, vibration-resistant fastening in critical applications
• High-strength performance backed by Rockwell C45 hardness rating for reliable load-bearing capacity
• Optimized torque transmission through 7/32" hex drive design prevents tool slippage and damage during installation
• Secure component positioning with cup tip design that provides positive contact and prevents loosening under stress
• Fine thread advantage with 7/16"-20 UNF specification offers superior adjustment precision and holding power
• Regulatory compliance assurance meeting ASME B18.3, ASTM F912, RoHS 3, and REACH standards for quality and safety

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering solutions where vibration resistance and precision positioning are paramount. The Class 3A thread fit provides exceptional dimensional accuracy for applications requiring minimal backlash and secure fastening in machinery, automotive components, and precision equipment. The headless design enables flush mounting in confined spaces while the cup tip creates positive mechanical locking against shafts and rotating elements. Engineered with fine UNF threads, this fastener maintains clamping force under dynamic loads, making it ideal for industrial set screw applications where reliability cannot be compromised. The black-oxide surface treatment adds an extra layer of corrosion protection, extending service life in challenging operating conditions.

Specification Summary & Compliance

This precision fastener features 7/16"-20 UNF fine threads with Class 3A thread fit for superior dimensional accuracy and tight tolerances. Manufacturing complies with ASME B18.3 specifications and ASTM F912 material standards. The set screw meets comprehensive regulatory requirements including RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) compliance for chemical safety. With a Rockwell C45 hardness rating, this fastener delivers consistent mechanical performance across industrial applications.