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ARP stainless steel nyloc hex nut kit, 1/2-13 coarse thread with a nylon locking insert. These heavy-duty hex nuts are designed for 1/2-13 fasteners found in engine and general automotive work where a secured threaded connection is needed. The nyloc insert provides resistance to loosening while the hex shape offers conventional tool engagement. Supplied as a set for dependable hardware installations.
ARP 1/2-13 SS coarse nyloc hex nut kit
