Collection: Tensilock Nuts

Tensilock nuts are hex flange nuts with serrations on the underside of the flange. The serrations bite into the mating surface and resist loosening from vibration, and the wide flange spreads the load, so no separate washer is needed.

Our range runs from M3 to M20 in coarse and fine metric thread, in class 10 steel with a yellow zinc finish and in bare A2 stainless.

The serrations mark the surface they bear on, so avoid them on painted or soft finishes where that matters. For a plain flange, see Flange Nuts.