S-91375A132 3-48 x 3/4" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating for extended service life in demanding industrial environments
• Exceptional holding power achieved through Rockwell C45 hardness and Class 3A thread fit for secure, vibration-resistant fastening
• Precise installation control with 0.050" hex drive design enabling reliable torque application in confined spaces
• Optimized material strength using alloy steel construction to withstand high mechanical stresses without deformation
• Enhanced grip performance featuring cup tip design that creates positive locking action on shaft surfaces
• Industry-standard compatibility with UNC coarse threads ensuring perfect interchangeability with existing components
• Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards for global applications

Professional Applications & Engineering Value

This 3-48 UNC set screw delivers critical engineering solutions for precision assembly applications where vibration resistance and permanent positioning are paramount. The black-oxide alloy steel construction provides exceptional durability against environmental factors while maintaining dimensional stability under load. The headless design with hex drive allows for flush mounting in space-constrained assemblies, making it ideal for securing collars, gears, and pulleys on shafts in machinery, automotive, and aerospace applications. The cup tip configuration ensures maximum biting force into shaft materials, preventing rotational slippage even under extreme operating conditions. With coarse thread spacing and Class 3A thread fit, this fastener offers reliable installation performance while maintaining precise alignment in high-vibration environments.

Specification Summary & Compliance

This set screw features precision 3-48 UNC threads with Class 3A thread fit for superior dimensional accuracy and consistent performance. Manufactured to ASME B18.3 specifications with Rockwell C45 hardness rating, ensuring mechanical reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications requiring strict regulatory adherence.