S-90289A194 8-32 x 1/2" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit ensuring precise, vibration-resistant fastening in demanding applications.
• Enhanced corrosion resistance provided by the black-oxide finish on alloy steel, extending service life in various industrial environments.
• High-strength durability from Rockwell C45 hardness, offering reliable performance under mechanical stress and repeated use.
• Secure anti-loosening lock via serrations that bite into mating surfaces, preventing unintended rotation in assemblies.
• Easy installation and removal with the 5/64" hex drive, allowing efficient maintenance and adjustments with standard tools.
• Versatile cup tip design that concentrates contact pressure for a firm grip on shafts or components without slipping.
• Broad compatibility with UNC coarse threads and right-hand direction, suitable for common machinery and equipment setups.

Professional Applications & Engineering Value

This 8-32 UNC set screw is engineered to address critical challenges in industrial settings, such as component slippage and vibration-induced failures. The black-oxide alloy steel construction, combined with Rockwell C45 hardness, ensures exceptional wear resistance and longevity, making it ideal for high-stress applications like motor shafts, gears, and precision instruments. The hex drive and headless design allow for compact installations in confined spaces, while the cup tip and serrations provide a secure, non-slip lock that maintains alignment under dynamic loads. By integrating coarse threads and Class 3A fit, it delivers reliable engagement in metals and plastics, reducing the risk of stripping and ensuring consistent performance in assembly lines, automotive systems, and heavy machinery.

Specification Summary & Compliance

This set screw adheres to ASME B18.3 specifications for dimensional accuracy and performance, with a Class 3A thread fit for tight tolerances and UNC coarse threads (8-32 size) in a right-hand direction. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met for global industrial use.