S-91375A685 7/16"-20 x 7/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in demanding industrial environments
• Exceptional thread precision with UNF Class 3A fine threads ensuring secure, vibration-resistant fastening in critical applications
• High-strength performance from Rockwell C45 hardened alloy steel, providing reliable holding power under heavy loads
• Easy installation and removal with hex drive design, allowing efficient maintenance with standard tools
• Secure component positioning through cup tip design that minimizes surface damage while maintaining firm grip
• Space-saving headless configuration ideal for applications where flush mounting is required
• Regulatory compliance assurance meeting ASME, RoHS 3, and REACH standards for global industrial acceptance

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 UNF Class 3A fine threads provide superior engagement in tapped holes, preventing loosening in high-vibration environments like machinery, automotive systems, and industrial equipment. The Rockwell C45 hardness ensures the fastener maintains its structural integrity under repeated stress cycles, while the black-oxide surface treatment offers enhanced corrosion protection without compromising dimensional accuracy. The headless design with hex drive allows for flush installation in confined spaces, making it ideal for securing gears, pulleys, and collars where protruding fastener heads are not feasible. This combination of precision threading, high-strength material, and protective coating addresses common industrial challenges of component slippage, corrosion-induced failure, and maintenance accessibility.

Specification Summary & Compliance

This set screw maintains precise thread dimensions with 7/16"-20 UNF Class 3A tolerance for superior fit in mating components. Manufactured to ASME B18.3 specifications (ASTM F912) ensuring consistent quality and dimensional accuracy. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations regarding chemical safety, making it suitable for global industrial applications requiring environmental responsibility.