S-92695A647 1/4"-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 that extends service life in demanding industrial environments
• Exceptional holding power thanks to the 90° cone point design that provides maximum grip and prevents component slippage
• Precision thread engagement with Class 3A UNC coarse threads ensuring reliable fastening in high-vibration applications
• Optimized drive efficiency through the hex socket headless design that allows flush mounting and easy installation in confined spaces
• Enhanced mechanical strength from Rockwell C45 hardened alloy steel construction that withstands heavy-duty operational stresses
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations for global industrial use
• Reduced maintenance requirements due to the combination of hardened material and protective coating that minimizes wear and degradation

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering solutions where vibration resistance and permanent positioning are paramount. The 90° cone point creates deep penetration into shaft materials, preventing rotational movement in power transmission systems, pulley assemblies, and gear mechanisms. The UNC coarse threads with Class 3A fit provide rapid installation while maintaining precise tolerance control, significantly reducing assembly time in high-volume manufacturing environments. The headless hex socket design enables flush mounting for applications where protruding fasteners would interfere with moving components or require streamlined profiles. Combined with Rockwell C45 hardness, this set screw maintains its mechanical integrity under continuous stress, making it ideal for heavy machinery, automotive systems, and industrial equipment where reliability cannot be compromised.

Specification Summary & Compliance

This precision-engineered set screw features 1/4"-20 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy and engagement. The fastener complies with ASME B18.3 dimensional specifications and ASTM F912 material standards, ensuring consistent performance across industrial applications. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, confirming the absence of restricted substances. The combination of right-hand thread direction, 1-1/4" length, and coarse thread spacing provides optimal fastening characteristics for permanent assembly requirements in various industrial sectors.