S-94105A544 1/4"-20 x 1 1/2" 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 demanding industrial environments
• Precise Class 3A thread fit ensures reliable, vibration-resistant fastening with minimal backlash
• High-strength alloy steel construction with Rockwell C45 hardness maintains integrity under heavy loads
• Headless hex socket design provides flush mounting and secure tool engagement in confined spaces
• Coarse UNC threading enables quick installation and superior holding power in various materials
• Flat tip configuration delivers maximum surface contact for secure component positioning
• Full regulatory compliance meets ASME B18.3, RoHS 3, and REACH standards for global industrial applications

Professional Applications & Engineering Value

These black-oxide alloy steel set screws deliver exceptional engineering value in precision assembly applications where space constraints and vibration resistance are critical concerns. The headless hex socket design allows for flush mounting in pulleys, gears, and collars, while the Class 3A UNC coarse threads provide superior grip strength in both metallic and non-metallic components. The Rockwell C45 hardness rating ensures the flat tip maintains its form under repeated adjustment cycles, preventing deformation that could compromise positioning accuracy. Ideal for industrial machinery, automotive components, and precision equipment, these set screws solve common challenges of component slippage, corrosion-induced failure, and maintenance accessibility in compact assemblies.

Specification Summary & Compliance

This 1/4"-20 UNC threaded set screw features precise Class 3A thread fit tolerances with coarse thread spacing for optimal engagement. Manufactured to ASME B18.3 specifications with ASTM F912 compliance, the fastener maintains dimensional accuracy throughout its 1 1/2" length. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, ensuring environmental responsibility and safe use across global industrial markets. Right-hand thread direction and consistent 0.25" thread diameter provide reliable performance in repetitive assembly operations.