S-91375A942 1-72 x 5/32" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Maximum holding power with Class 3A thread fit for secure, vibration-resistant fastening in precision assemblies
• Superior corrosion resistance from black-oxide treated alloy steel, extending service life in harsh industrial environments
• High-strength durability with Rockwell C45 hardness, maintaining structural integrity under repeated torque and load
• Space-saving headless design allows flush mounting in confined spaces without protruding components
• Precise torque application via 0.035" hex drive, preventing tool slippage and ensuring consistent installation
• Enhanced grip from cup tip configuration, minimizing component movement in high-vibration applications
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for global industrial use

Professional Applications & Engineering Value

This 1-72 UNF set screw delivers critical engineering solutions for precision machinery and industrial equipment requiring reliable component positioning. The black-oxide alloy steel construction provides essential corrosion protection in manufacturing environments exposed to moisture and chemicals, while the Class 3A thread fit ensures zero backlash in high-precision applications like optical instruments, medical devices, and aerospace assemblies. The headless hex drive design with 0.035" drive size enables installation in space-constrained applications where traditional fastener heads would interfere. The fine UNF threads and cup tip work synergistically to prevent loosening under vibration, making this set screw ideal for securing gears, pulleys, and collars in rotating machinery where positional accuracy is paramount.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit for superior dimensional accuracy and consistent performance. The UNF fine thread (1-72) provides increased tensile strength and better stress distribution compared to coarse threads. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global markets. The Rockwell C45 hardness guarantees mechanical strength while the black-oxide surface treatment enhances corrosion resistance without dimensional alteration.