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![]() | Distorted Thread |
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About Nuts, Materials, and Finishes
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Mil. Spec. Low-Strength Steel Distorted-Thread Flange Locknuts

Choose these flange locknuts for their adherence to strict military standards for material and construction. They have an irregularly-shaped thread that grips the bolt for a stronger hold than nylon-insert flange locknuts. A flange that distributes pressure where the nut meets the material surface, eliminating the need for a separate washer. They're not reusable. A cadmium yellow-chromate plating provides corrosion resistance in wet environments. Height includes the flange.
For technical drawings and 3-D models, click on a part number.
Flange | Locknuts | |||||||
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Thread Size | Wd. | Ht. | Dia. | Thick. | Pkg. Qty. | Specifications Met | Pkg. | |
Cadmium Yellow-Chromate Plated Steel | ||||||||
5/16"-24 | 3/8" | 17/64" | 0.52" | 0.04" | 1 | MS21042-5 | 000000000 | 00000 |