S-90673A115 1/2"-20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through distorted top-lock thread technology, preventing loosening in high-stress environments
• Enhanced durability and corrosion protection with black-oxide steel construction, extending service life in industrial conditions
• Precise fine thread engagement with 1/2"-20 UNF Class 2B threads ensuring reliable, secure fastening connections
• High-strength performance meeting Grade 5 specifications, suitable for demanding mechanical applications
• Easy installation and removal with standard external hex drive design compatible with common tools
• Regulatory compliance assurance with RoHS 3 and REACH standards for safe industrial use
• Optimized dimensional stability with 3/4" width and 1/2" height for consistent performance across applications

Professional Applications & Engineering Value

This Grade 5 black-oxide steel locknut delivers exceptional engineering value through its distorted thread locking mechanism that actively counters vibration-induced loosening - a critical failure point in industrial machinery, automotive assemblies, and heavy equipment. The UNF fine thread configuration (1/2"-20) provides increased thread engagement density compared to coarse threads, enhancing load distribution and resistance to shock loads. The black-oxide surface treatment creates a protective barrier against corrosion while maintaining dimensional integrity. These features combine to solve common industrial challenges including maintenance reduction, joint integrity preservation, and compliance with environmental regulations, making it ideal for vibration-prone applications where reliable, long-term fastening is essential.

Specification Summary & Compliance

This locknut features Class 2B thread fit tolerance ensuring precise dimensional accuracy and interchangeability. Manufactured to UNF fine thread standards (1/2"-20) with right-hand thread direction and external hex drive style. The product maintains compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for industrial components. The Grade 5 strength classification guarantees consistent mechanical performance across production batches.