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ARP stainless steel nyloc hex nut kit, 5/16-18 coarse thread with a nylon locking insert. These hex nuts offer vibration-resistant retention for 5/16-18 fasteners used in engine and general automotive assemblies. The integrated nylon element provides a mechanical locking feature that helps maintain clamp in dynamic conditions. Supplied as hardware nuts for use where keyed or locking nuts are required.
ARP 5/16-18 SS coarse nyloc hex nut kit
