S-92505A761 1/2"-20 x 1" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black oxide finish for extended service life in demanding environments
• Precise Class 3A thread fit ensures tight, secure fastening with minimal backlash in critical assemblies
• Extended tip design provides deeper penetration and superior resistance to loosening under vibration
• High-strength alloy steel construction with Rockwell C45 hardness maintains integrity under heavy loads
• 1/4" hex drive enables high-torque installation without stripping while remaining headless for flush mounting
• Fine UNF threading offers improved adjustment precision and better stress distribution
• Full regulatory compliance including RoHS 3 and REACH for use in restricted substance-sensitive applications

Professional Applications & Engineering Value

This black oxide alloy steel set screw delivers exceptional performance in high-vibration and precision alignment applications. The extended tip design (0.13" length) creates positive engagement in shaft collars, gears, and pulleys, preventing rotational slippage that compromises machinery accuracy. With Class 3A UNF fine threads and Rockwell C45 hardness, it maintains clamping force in dynamic loads where standard fasteners fail. The headless configuration enables flush mounting in confined spaces while the 1/4" hex drive accommodates standard tools for consistent installation torque. Ideal for precision machinery, automotive components, and industrial equipment requiring reliable, vibration-resistant fastening solutions.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit for precision tolerance. Features 1/2"-20 UNF fine threads with right-hand direction, 1" length, and extended tip dimensions (0.343" diameter with -0.009" to 0 tolerance). Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety and restricted substance management.