S-91839A314 1/4"-20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through flex-top locking design that maintains secure fastening in high-motion environments
• Exceptional corrosion protection with black-oxide coated 18-8 stainless steel construction for extended service life
• Reliable thread engagement with Class 2B thread fit ensuring consistent performance and easy installation
• Optimized torque transmission through standard external hex drive design for efficient assembly with common tools
• Wide compatibility with 1/4"-20 UNC coarse threads meeting common industrial equipment requirements
• Environmental compliance with RoHS 3 and REACH regulations for safe use across regulated industries
• Dimensional precision with 7/16" width and 19/64" height for consistent fit in standard applications

Professional Applications & Engineering Value

This black-oxide 18-8 stainless steel flex-top hex locknut delivers critical vibration resistance where traditional fasteners fail. The flex-top locking mechanism creates consistent radial pressure against mating threads, preventing loosening under continuous stress while maintaining UNC coarse thread compatibility. The black-oxide surface treatment on 18-8 stainless steel provides enhanced corrosion resistance beyond standard stainless, making it ideal for industrial machinery, automotive assemblies, and outdoor equipment exposed to moisture and chemicals. The external hex drive design ensures reliable torque application with standard wrenches, streamlining maintenance procedures while the Class 2B thread fit guarantees smooth installation without compromising locking security.

Specification Summary & Compliance

Manufactured to precise dimensional standards with 1/4"-20 UNC coarse threads and Class 2B thread fit for consistent performance. The locknut features standard hex profile (7/16" width, 19/64" height) and right-hand thread direction. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and regulatory acceptance across global markets.