S-90289A718 1/2"-13 x 1 3/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in harsh industrial environments
• Exceptional holding power from Class 3A thread fit, ensuring precise, vibration-resistant fastening
• High-strength performance with Rockwell C45 hardness, providing reliable load-bearing capacity
• Secure locking mechanism through serrations, preventing component slippage under dynamic loads
• Easy installation and removal with 1/4" hex drive, enabling efficient maintenance operations
• Optimized torque transmission with cup tip design, minimizing surface damage to mating components
• Space-saving headless design allowing flush mounting in confined assembly spaces

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering solutions for industrial applications requiring permanent, high-strength fastening. The 1/2"-13 UNC coarse thread with Class 3A fit provides superior resistance to vibration loosening in machinery, automotive components, and power transmission systems. The corrosion-resistant black-oxide finish protects against oxidation in demanding environments, while the Rockwell C45 hardness ensures dimensional stability under heavy loads. The combination of serrations locking and cup tip design creates a secure, mar-resistant connection point, making it ideal for precision shaft collars, gears, and pulley assemblies where reliability is paramount.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit for precision dimensional accuracy. Features 1/2"-13 UNC coarse threads with right-hand direction and standard 1-3/4" length. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.