S-91375A175 4-48 x 3/32" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide finish, extending service life in demanding environments
• Precise Class 3A thread fit ensures reliable, vibration-resistant fastening for critical assemblies
• High-strength Rockwell C45 hardness provides excellent wear resistance and prevents stripping
• Compact 3/32" length and headless design saves space in confined applications
• 0.050" hex drive allows secure installation with standard tools, reducing slippage risk
• Cup tip design creates positive seating and minimizes component surface damage
• Fine UNF thread spacing delivers superior holding power in thin materials

Professional Applications & Engineering Value

This 4-48 UNF Class 3A Black-Oxide Alloy Steel set screw addresses critical engineering challenges in precision assemblies. The Black-Oxide surface treatment provides essential corrosion protection for industrial equipment exposed to moisture or chemicals, while the Rockwell C45 hardness maintains dimensional stability under repeated torque applications. The headless design with 0.050" hex drive enables flush mounting in space-constrained machinery, and the cup tip ensures secure contact without marring precision components. Ideal for securing gears, pulleys, and collars in automotive, aerospace, and manufacturing equipment where vibration resistance and reliable positioning are paramount.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit for superior dimensional accuracy. Features 4-48 UNF fine threads with right-hand direction and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards for environmental safety. The Black-Oxide Alloy Steel construction ensures consistent performance across industrial applications.