S-90673A104 1/2"-13 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through precision distorted thread locking technology that maintains secure fastening under dynamic loads
• Exceptional durability with Grade 5 steel construction providing reliable performance in demanding industrial environments
• Enhanced corrosion protection from black-oxide surface treatment extending service life in various operating conditions
• Precise 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
• Regulatory compliance assurance meeting both REACH and RoHS 3 standards for safe industrial usage
• Reliable right-hand coarse threading with 1/2"-13 UNC specification providing strong holding power in heavy-duty applications

Professional Applications & Engineering Value

This Grade 5 black-oxide steel locknut delivers critical vibration resistance through its innovative distorted thread locking technology, specifically engineered to prevent loosening in high-stress environments. The 1/2"-13 UNC coarse thread configuration combined with Class 2B thread fit ensures precise engagement and reliable performance in machinery, automotive, and construction applications where constant motion and vibration pose significant challenges. The external hex drive style allows for efficient installation using standard tools, while the black-oxide coating provides essential corrosion protection, extending service life in demanding conditions. This industrial-grade locking solution maintains clamping force integrity even under extreme operational stresses, making it ideal for heavy equipment, structural assemblies, and mechanical systems requiring dependable, long-term fastening security.

Specification Summary & Compliance

This locknut features 1/2"-13 UNC coarse threading with Class 2B thread fit for precise dimensional accuracy, manufactured from Grade 5 steel with black-oxide surface treatment. The nut measures 3/4" in width and 1/2" in height, utilizing top lock distorted thread technology for secure fastening. The product is fully compliant with REACH (EC 1907/2006) regulations and RoHS 3 (2015/863/EU) directives, ensuring environmental safety and regulatory adherence for industrial applications.