Jam Nut-Zinc plated steel jam nut. These are sold individually. Typically instock and ship within 1 business day.
Jam Nut For Muzzle Brake (1/2-28 Nut)
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10-32 Nylock Jam Nut - AndyMark, Inc
Jam nut
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Hex Jam Nuts, Nuts, US Hardware, Hardware