Grade A Reversible Locknut Clear Zinc Cr3 Plating

The Grade A reversible locknut with clear zinc Cr3 plating is a dependable, cost-effective solution for applications that demand vibration resistance, reusability, and easy installation. Designed to function in either orientation—hence the term reversible—this all-metal locknut features a deformed thread section that provides consistent prevailing torque, helping prevent loosening even under heavy vibration and thermal expansion.

Commonly used in automotive assemblies, industrial machinery, HVAC systems, agricultural equipment, and metal structures, these locknuts are ideal where secure, reusable fastening is needed without relying on nylon inserts or adhesives. Because they’re all-metal, they’re well-suited for higher temperature environments, and the Grade A classification ensures standardized mechanical properties and performance under load.

What makes this version stand out is its clear zinc Cr3 plating, which offers enhanced corrosion resistance while maintaining a clean, silver appearance. The trivalent chromium (Cr3) coating is RoHS-compliant, making it a more environmentally friendly and worker-safe alternative to traditional hexavalent chrome. It’s perfect for indoor and mildly corrosive environments, such as electrical cabinets, general construction, and light equipment.

Specifications include:

• Type: Reversible all-metal locknut

• Grade: A (per ASTM and SAE standards)

• Material: Carbon steel

• Finish: Clear zinc Cr3 plating (RoHS-compliant)

• Thread Type: Inch (UNC/UNF)

• Sizes: Commonly from #6-32 up to 1"-8

• Locking Feature: Prevailing torque via thread deformation

• Standards: ASME B18.16.6, SAE J995

If you're looking for a durable, vibration-resistant, and eco-conscious locknut solution, the Grade A reversible locknut with clear zinc plating checks all the boxes.

Need help selecting the right size or bulk ordering? Our fastener specialists are here to assist with tailored recommendations.