S-91375A088 3-48 x 3/32" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating on alloy steel for extended service life in demanding environments
• Precise component positioning through Class 3A thread fit ensuring tighter tolerances and secure fastening
• High-strength performance with Rockwell C45 hardness providing excellent resistance to wear and deformation
• Easy installation in confined spaces thanks to headless hex drive design requiring minimal clearance
• Enhanced grip and anti-loosening from cup tip design that creates positive seating in mating parts
• Reliable coarse threading (UNC) for quicker assembly and reduced cross-threading risks in industrial applications
• Full regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for global supply chain integration

Professional Applications & Engineering Value

This 3-48 UNC set screw delivers critical engineering solutions for precision machinery and permanent assemblies. The black-oxide alloy steel construction combined with Rockwell C45 hardness provides exceptional durability against vibrational loosening and environmental exposure. The headless hex drive design allows installation in space-constrained applications while maintaining high torque transmission. With Class 3A thread fit and coarse thread spacing, this fastener ensures rapid assembly with minimal thread damage risk, making it ideal for securing gears, pulleys, and collars in automotive, aerospace, and industrial equipment where reliable positioning is paramount.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit for precision dimensional accuracy. Features UNC coarse threads with 0.099" diameter and 3/32" length in inch system measurements. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in regulated industries worldwide.