S-91375A316 1/4"-28 x 7/16" 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 harsh industrial environments
• Exceptional holding power with Rockwell C45 hardness providing reliable, vibration-resistant fastening
• Precise thread engagement with Class 3A fit ensuring consistent, secure connections in critical applications
• Easy installation and removal with hex drive design allowing for straightforward tool access and torque application
• Maximum grip strength with cup point tip that bites into materials for superior anti-loosening performance
• Space-saving design with headless construction ideal for confined spaces and flush mounting requirements
• Fine thread advantage with UNF 1/4"-28 threads offering better adjustment control and vibration resistance

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional engineering value in demanding industrial applications where vibration resistance and corrosion protection are critical. The Class 3A thread fit ensures precise tolerance control for secure fastening in precision machinery, automotive components, and manufacturing equipment. The cup point design provides superior biting action that prevents rotational slippage, making it ideal for securing gears, pulleys, and collars on shafts. The headless configuration with hex drive allows for installation in tight spaces while maintaining easy serviceability. Engineered to withstand rigorous operating conditions, this UNF fine thread set screw offers reliable performance in assembly lines, power transmission systems, and heavy equipment where consistent clamping force is essential.

Specification Summary & Compliance

This precision set screw features 1/4"-28 UNF fine threads with Class 3A thread fit for superior dimensional accuracy. Manufactured from high-strength alloy steel with black-oxide surface treatment and Rockwell C45 hardness rating. The fastener meets ASME B18.3 specifications (ASTM F912) and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.