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The ARP 1/2-13 black coarse hex nut kit supplies coarse-thread hex nuts finished in black for 1/2-13 fasteners, intended for engine and mechanical assemblies. These nuts match common half-inch coarse-thread bolts used in maintenance and rebuilds, offering predictable engagement and replacement convenience. Keep them available for repairs where matching thread size and finish are required.
ARP 1/2-13 black coarse hex nut kit
