An6P Front Acorn Nuts(50 Pcs) Fire and Rescue Helmets A nut with a finished top that covers the end of the bolt. Cap nuts work with connector bolts for surface to surface application. Use these with 1/2-13 connector bolts. Inside Diameter: 1/2 Inch Thread Per Inch: 13 Thread Type: Coarse Standard Thread Material 18-8 (304) Stainless Steel
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