1/2"-20 Case Hardened Serrated Flange Nut Clear Zinc Cr3 Plating

Serrated Flange Case Hardened Hex All Metal Locknuts – Maximum Grip with Built-In Locking Power

Serrated flange case hardened hex all metal locknuts with clear zinc Cr3 plating are engineered for applications where vibration resistance, strength, and reliability are non-negotiable. These high-performance locknuts combine all-metal prevailing torque locking with an integrated serrated flange, delivering exceptional resistance to loosening without the need for washers, thread lockers, or secondary hardware.

How Serrated Flange Locknuts Work

The serrated flange is designed to bite into the mating surface during installation, creating a strong mechanical bond that resists back-off from vibration and shock. At the same time, the flange distributes clamping force evenly across the surface, reducing the risk of joint failure. Because these are all-metal locknuts, they retain full locking strength in high-temperature environments where nylon insert locknuts may fail.

Built for High-Stress Applications

Constructed from case hardened steel, these locknuts offer excellent surface hardness for wear resistance while maintaining a tough, durable core. This makes them ideal for high-torque and high-vibration environments such as automotive assemblies, construction and agricultural equipment, heavy machinery, and power transmission systems. The standard hex body allows for easy installation with common hand or power tools.

Corrosion Protection with Clear Zinc Cr3

The clear zinc Cr3 (trivalent chromium) plating provides a clean, bright appearance along with dependable corrosion resistance. This finish helps protect against rust and oxidation in moisture-prone or mildly corrosive environments. Unlike older Cr6 coatings, Cr3 plating is RoHS-compliant, making it a safer and more environmentally responsible choice.

Key Specifications

• Type: Serrated flange hex all metal locknut

• Material: Case hardened steel

• Finish: Clear zinc Cr3 plating

• Locking Mechanism: Prevailing torque with serrated flange

• Thread Types: UNC, UNF, metric coarse, metric fine

• Sizes: #6-32 to 1-1/2"

• Standards: ASME B18.16.6, DIN 6923

Lock It Once. Trust It Every Time.

When you need maximum grip, vibration resistance, and corrosion protection, serrated flange case hardened locknuts with clear zinc Cr3 plating deliver confidence under load. Reach out today for sizing help, bulk options, or technical support tailored to your application.