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Grade A Reversible Locknut Clear Zinc Cr3 Plating

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Grade A Reversible Locknuts – Reliable, Reusable Locking with Corrosion Protection

The Grade A reversible locknut with clear zinc Cr3 plating is a proven fastening solution for applications that demand vibration resistance, reusability, and straightforward installation. Designed to function effectively in either orientation, this reversible all-metal locknut simplifies assembly while delivering consistent, long-lasting holding power.

How Reversible Locknuts Work

These locknuts use a deformed thread section to create prevailing torque against the mating bolt. As the nut is tightened, controlled thread interference resists loosening caused by vibration, shock, or thermal expansion. Because the locking feature is built entirely from metal, there are no nylon inserts or chemical adhesives to degrade—making these locknuts ideal for elevated-temperature applications and repeated use.

Where Grade A Reversible Locknuts Are Used

Grade A reversible locknuts are commonly found in automotive assemblies, industrial machinery, HVAC systems, agricultural equipment, and structural steel connections. They’re especially useful in maintenance-friendly designs where fasteners may need to be removed and reinstalled without sacrificing locking performance. The Grade A classification ensures standardized mechanical properties suitable for light to medium structural loads.

Clear Zinc Cr3 Plating Advantages

Finished with clear zinc Cr3 (trivalent chromium) plating, these locknuts gain added corrosion resistance along with a clean, professional silver appearance. The Cr3 coating protects against rust and oxidation in indoor and mildly corrosive environments such as electrical enclosures, light construction, and general equipment assemblies. Unlike older Cr6 finishes, Cr3 plating is RoHS-compliant, offering a safer and more environmentally responsible solution.

Key Specifications

Type: Reversible all-metal locknut
Grade: A
Material: Carbon steel
Finish: Clear zinc Cr3, RoHS-compliant
Thread Types: UNC and UNF
Sizes: #6-32 through 1"-8
Locking Method: Prevailing torque via thread deformation
Standards: ASME B18.16.6, SAE J995

A Smart Choice for Secure, Reusable Fastening

If you need a durable, vibration-resistant, and eco-conscious locknut, the Grade A reversible locknut with clear zinc Cr3 plating delivers dependable performance. Need sizing guidance or bulk pricing? Our fastener specialists are ready to help.