An irregularly-shaped thread grips the bolt for a stronger hold than nylon-insert flange locknuts. They have a flange that distributes pressure where the nut meets the material surface, eliminating the need for a separate washer. Grade G locknuts are comparable in strength to Grade 8 bolts. Height includes the flange.

Yellow zinc-plated steel locknuts resist corrosion in wet environments.

For technical drawings and 3-D models, click on a part number.