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Serrated Hex Flange Lock Nuts, Stainless Steel 304

Also known as:  

Hex Serrated Flange Nuts, Whiz Locks

A serrated flange is what gives Flange Lock Nuts their superior gripping properties and, for this reason, no lock washers are needed. The flange creates a large bearing surface offering better distribution of the load, and less torque is needed to install than remove because of the serrations. Oversized and irregular holes can be covered by the flange of these reusable nuts.