Gibraltar Flange Nuts
Gibraltar flange nuts are serrated-flange locking nuts — teeth on the bearing face bite into the surface to resist back-off under vibration, with the built-in washer face spreading load. A strong one-part locking solution for non-finished surfaces.
Note the serrations mar the bearing surface, so they are not for finished faces. For those, use a smooth steel flange nut.
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Gibraltar Serrated Flange Nuts
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FAQ
What are Gibraltar flange nuts?
Serrated-flange locking nuts whose teeth bite the surface to resist vibration loosening, combining a washer face and a lock in one part.
Do serrated flange nuts damage the surface?
The serrations mar the bearing face, which is fine on structural and non-finished surfaces but not on finished faces.
Part of our full Flange Nuts selection. Browse all nut types or contact our sales team for sizing, cross-references, or bulk pricing. Eugene Fastener & Supply — serving the Pacific Northwest since 1969.