1/2"-13 UNC Serrated Flange Hex Locknuts Lock Nuts, Zinc Plated Carbon Steel, 3/4" Hex Drive, 10 PCS 1/2"-13 (10 PCS) auspowers_batchone then dries glossy in 14

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1/2"-13 UNC Serrated Flange Hex Locknuts Lock Nuts, Zinc Plated Carbon Steel, 3/4" Hex Drive, 10 PCS 1/2"-13 (10 PCS) auspowers_batchone then dries glossy in 141 2" 13 UNC Serrated Flange Hex Locknuts Lock Nuts, Zinc Plated Carbon Steel, 3 4" Hex Drive, 10 PCS SIZE: 1 2 13 Packaged Included: 10 PCS About Serrated Flange Hex Lock Nuts Flange nuts have a washer like base to distribute pressure over a greater surface area and ensure the fastener stay tight. Flange nuts have flat and serrated designs. Serrated flange nuts are fabricated with a built in serrated washer that resists loosening due to vibration.