S-91385A934 3/4"-10 x 1" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance with built-in nylon pellet thread locker that maintains secure fastening in high-stress environments
• Exceptional durability through Rockwell C28 hardness black-oxide alloy steel construction for extended service life
• Precise thread engagement with Class 3A fit UNC coarse threads ensuring reliable performance in demanding applications
• High-temperature compatibility with thread locker that performs reliably up to 250°F (121°C)
• Easy installation and removal using standard 3/8" hex drive tools for efficient maintenance operations
• Enhanced gripping capability through cup tip design that provides superior holding power on shafts and components
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations for global industrial use

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers exceptional engineering value in industrial applications where vibration resistance and thermal stability are critical. The UNC Class 3A thread specification ensures precise fitment in machinery, automotive assemblies, and heavy equipment, while the nylon pellet locking technology prevents loosening under continuous operational stress. The headless design with hex drive allows for flush mounting in confined spaces, making it ideal for shaft collars, gears, and pulleys where protrusion isn't feasible. The black-oxide surface treatment provides corrosion resistance, extending component life in challenging environments. With its coarse thread spacing and cup tip configuration, this set screw offers reliable clamping force for permanent or semi-permanent fastening solutions across manufacturing, aerospace, and industrial maintenance sectors.

Specification Summary & Compliance

This high-performance set screw features 3/4"-10 UNC Class 3A threads with coarse spacing, manufactured to ASME B18.3 specifications where applicable under ASTM F912. The thread fit maintains Class 3A tolerance for precision applications, while the construction meets Rockwell C28 hardness standards for optimal strength. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility. The nylon pellet thread locker is rated for temperatures up to 250°F, providing reliable performance across industrial temperature ranges without compromising fastener integrity.