S-91375A859 3/4"-16 x 1 1/2" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in demanding industrial environments
• Exceptional torque transmission through 3/8" hex drive design, preventing tool slippage during installation
• Precision thread engagement with Class 3A UNF fine threads ensuring secure, vibration-resistant fastening
• Maximum material strength from Rockwell C45 hardened alloy steel, resisting deformation under heavy loads
• Reliable positioning capability with cup tip design providing positive contact and minimal surface damage
• Headless construction allowing flush mounting in space-constrained applications
• Industry compliance assurance meeting ASME B18.3 and ASTM F912 specifications for consistent performance

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical engineering solutions for industrial machinery, automotive components, and precision equipment. The Class 3A UNF fine threads maintain superior clamping force in high-vibration environments, while the Rockwell C45 hardness prevents thread stripping under extreme torque conditions. The headless design with 3/8" hex drive enables installation in confined spaces where traditional fasteners cannot operate. The black-oxide surface treatment provides essential corrosion protection without compromising dimensional accuracy, making these set screws ideal for permanent assemblies requiring reliable, maintenance-free performance in harsh operating conditions.

Specification Summary & Compliance

Manufactured to ASME B18.3 and ASTM F912 specifications with Class 3A thread fit for precision tolerance. Features 3/4"-16 UNF fine threads, 1-1/2" length, and 3/8" hex drive. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.