S-91385A143 6-32 x 3/16" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Permanent vibration resistance with integrated nylon patch thread locker that maintains locking integrity across extreme temperature fluctuations from -50°F to 250°F
• Superior corrosion protection through black-oxide surface treatment on alloy steel, extending service life in demanding industrial environments
• Precision Class 3A thread fit ensures tighter tolerances and more reliable fastening compared to standard Class 2A components
• High-strength construction with Rockwell C45 hardness rating provides exceptional resistance to wear and deformation under load
• Space-saving headless design enables flush mounting in confined assemblies while maintaining full fastening capability
• Secure hex drive installation with 1/16" drive size prevents cam-out during torque application for consistent seating
• Cup tip configuration creates positive biting action on shaft surfaces for enhanced anti-rotation performance

Professional Applications & Engineering Value

This black-oxide alloy steel set screw delivers critical vibration resistance in precision assemblies where loosening under dynamic loads poses significant reliability concerns. The permanent nylon patch locking technology embedded in the 6-32 UNC coarse threads creates a chemical-mechanical bond that withstands extreme thermal cycling from -50°F to 250°F, eliminating the need for secondary locking mechanisms. The headless design with hex drive accommodates space-constrained applications while the cup tip provides superior grip on shaft surfaces. Engineered for industrial equipment, automotive components, and precision machinery, this fastener maintains clamping force through severe operating conditions while meeting rigorous industry standards.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit for precision assembly requirements. The UNC coarse thread with 6-32 size and 3/16" length provides optimal engagement characteristics. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures suitability for global industrial applications. Material certification confirms Rockwell C45 hardness and black-oxide alloy steel construction for consistent performance.