S-90289A750 1/2"-20 x 3/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from the black-oxide finish, extending service life in harsh industrial environments.
• Exceptional thread precision with Class 3A fit for tighter tolerances and reliable, vibration-resistant assemblies.
• High-strength durability thanks to alloy steel construction and Rockwell C45 hardness, resisting wear and deformation.
• Secure, non-slip fastening from the cup point tip and serrations, preventing component movement under load.
• Easy installation and removal with a 1/4" hex drive, allowing efficient maintenance in confined spaces.
• Compliance with industry standards including ASME B18.3, ensuring consistent quality and interoperability.
• Environmental and safety adherence through RoHS 3 and REACH compliance, supporting sustainable operations.

Professional Applications & Engineering Value

This black-oxide alloy steel set screw is engineered to address common industrial challenges like vibration loosening and corrosion in machinery assemblies. Featuring a headless design and 1/2"-20 UNF fine thread with Class 3A precision, it ensures minimal protrusion and superior grip in tight spaces, making it ideal for precision equipment, automotive components, and heavy-duty industrial applications. The cup point tip and serrations dig into shafts or hubs, providing lasting security against rotational forces, while the Rockwell C45 hardness and corrosion-resistant coating enhance longevity in demanding environments, reducing maintenance downtime and improving overall assembly reliability.

Specification Summary & Compliance

This set screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for high precision in UNF fine threads. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, ensuring environmental safety and regulatory alignment for industrial use.