S-90045A445 1/4"-20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through precision distorted thread technology that maintains clamp force in high-motion applications
• Excellent corrosion resistance with 18-8 stainless steel construction for extended service life in harsh environments
• Optimal torque transmission via external hex drive design that prevents tool slippage during installation
• Reliable thread engagement with Class 2B thread fit ensuring consistent performance and easy assembly
• Secure locking action from top lock distorted thread design that eliminates the need for additional locking components
• Industry-standard compatibility with UNC coarse 1/4"-20 threads for broad application across equipment and machinery
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe industrial usage

Professional Applications & Engineering Value

This 18-8 stainless steel locknut addresses critical vibration-induced loosening challenges in industrial environments through its innovative distorted thread technology. The top lock design creates controlled interference with mating threads, generating consistent prevailing torque that resists rotational forces from machinery vibration and thermal cycling. The external hex drive configuration enables high-torque installation using standard tools while the UNC coarse thread profile ensures rapid assembly in production settings. Manufactured from corrosion-resistant 18-8 stainless steel, this fastener maintains integrity in demanding applications including automotive assemblies, conveyor systems, and outdoor equipment where moisture and chemicals are present. The combination of material durability and advanced locking mechanism provides engineers with a reliable solution for critical joints subject to dynamic loads.

Specification Summary & Compliance

This locknut features precision 1/4"-20 UNC coarse threads with Class 2B thread fit tolerances for consistent engagement. The external hex measures 7/16" across flats with a 7/32" height profile. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe usage across industrial applications. The right-hand thread direction and top lock distorted thread design provide reliable vibration resistance while maintaining industry-standard compatibility.