S-94105A538 1/4"-20 x 5/8" 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 holding power provided by Class 3A thread fit, ensuring precise, vibration-resistant fastening.
• High-strength alloy steel construction with Rockwell C45 hardness for reliable performance under heavy loads.
• Easy installation and removal using a standard 1/8" hex key, saving time and reducing tooling complexity.
• Secure, flush-mount design with a flat tip and headless style, ideal for applications where protrusion is not acceptable.
• Wide compatibility with coarse UNC 1/4"-20 threading, suitable for common industrial components and assemblies.
• Regulatory peace of mind through compliance with ASME B18.3, RoHS 3, and REACH standards.

Professional Applications & Engineering Value

This black-oxide alloy steel set screw is engineered to address critical challenges in industrial assembly, such as vibration loosening and corrosive wear. The Class 3A thread fit and coarse UNC threading provide superior grip and alignment in machinery, automotive, and heavy equipment applications, reducing maintenance downtime. Its headless, hex drive design allows for flush installation in tight spaces, while the flat tip distributes pressure evenly to prevent damage to secured components. Ideal for permanent or semi-permanent fastening in high-stress environments, this screw ensures long-term reliability and compliance with global engineering standards.

Specification Summary & Compliance

This set screw features a 1/4"-20 UNC coarse thread with Class 3A precision fit and a length of 5/8". It meets ASME B18.3 specifications for dimensional accuracy and is manufactured from alloy steel with a Rockwell C45 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are upheld.