S-95289A521 3/8"-16 x 3/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black oxide finish, extending service life in demanding industrial environments
• Superior holding power through extended tip design (0.198" length) that creates deeper engagement and prevents component slippage
• Precise Class 3A thread fit ensures tight tolerances and reliable fastening in critical applications
• High-strength performance with Rockwell C45 hardness alloy steel construction for maximum durability under load
• Secure installation and removal using the 3/16" hex drive that prevents tool slippage and stripping
• Optimized for coarse thread applications with 3/8"-16 UNC configuration, providing rapid assembly and vibration resistance
• Headless design allows for flush mounting in space-constrained applications while maintaining full fastening capability

Professional Applications & Engineering Value

This black oxide alloy steel set screw delivers exceptional engineering value in industrial applications where vibration resistance and permanent positioning are critical. The extended tip design creates deeper penetration into mating components, solving common slippage issues in pulleys, gears, and collars. The Class 3A thread fit combined with coarse UNC threads ensures rapid assembly while maintaining precision in high-vibration environments. The headless configuration with hex drive provides reliable installation in confined spaces where traditional fastener heads would interfere. Manufactured from high-strength alloy steel with Rockwell C45 hardness, this set screw maintains integrity under substantial mechanical stress, making it ideal for machinery, automotive, and heavy equipment applications requiring dependable, long-term fastening solutions.

Specification Summary & Compliance

This set screw features precision 3/8"-16 UNC coarse threads with Class 3A fit for superior dimensional accuracy. The extended tip maintains tight tolerances with tip length of 0.198" (-0.005" to 0" tolerance) and tip diameter of 0.25" (-0.009" to 0" tolerance). Manufacturing complies with ASME B18.3 specifications where applicable to ASTM F912. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant for environmental and safety standards, ensuring suitability for global industrial markets.