S-91385A189 8-32 x 3/16" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance with nylon patch thread locking that maintains integrity from -50°F to 250°F
• Exceptional durability from Rockwell C45 hardened black-oxide alloy steel construction
• Precise thread engagement with Class 3A fit for reliable fastening in demanding applications
• Easy installation in confined spaces using standard 5/64" hex drive with headless design
• Enhanced grip and positioning through cup tip design for secure component alignment
• Industry-standard compatibility with UNC coarse 8-32 threading for broad application use
• Environmental compliance assurance meeting RoHS 3 and REACH regulations

Professional Applications & Engineering Value

This 8-32 UNC thread set screw delivers critical vibration resistance in industrial machinery, automotive assemblies, and precision equipment where secure component positioning is paramount. The nylon patch locking technology prevents loosening under dynamic loads while the black-oxide alloy steel construction provides corrosion resistance and durability. The headless design with hex drive enables flush mounting in space-constrained applications, and the cup tip ensures maximum contact pressure for permanent shaft-hub connections. Engineered to withstand extreme temperature fluctuations from -50°F to 250°F, this fastener solves common vibration-induced failure challenges in rotating assemblies and precision alignment systems.

Specification Summary & Compliance

Manufactured to ASME B18.3 and ASTM F912 specifications with Class 3A thread fit for precision tolerance. Features 8-32 UNC coarse thread with right-hand direction and 3/16" length. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.