S-92695A831 1/2"-20 x 2 1/2" 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
• Precise Class 3A thread fit ensures secure, vibration-resistant fastening with minimal backlash
• High-strength Rockwell C45 hardness provides exceptional durability under heavy mechanical stress
• 90° cone point design creates positive seating and prevents component slippage
• 1/4" hex drive compatibility allows for standard tooling and simplified installation
• Headless construction enables flush mounting in space-constrained applications
• Fine UNF thread profile delivers enhanced clamping force distribution

Professional Applications & Engineering Value

This black-oxide alloy steel set screw addresses critical engineering challenges in power transmission systems, machinery assembly, and precision equipment. The Class 3A UNF fine threads maintain dimensional stability under vibration, while the 90° cone point bites securely into shaft materials without causing surface damage. The Rockwell C45 hardness rating ensures reliable performance in high-torque applications where set screws must resist loosening under cyclic loading. Ideal for securing gears, pulleys, and collars in manufacturing, automotive, and industrial maintenance applications where headless fasteners are required for compact designs.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread tolerances for precision fit. Features 1/2"-20 UNF fine threads with right-hand orientation and 2-1/2" length. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Black-oxide surface treatment on alloy steel substrate provides consistent corrosion protection.