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ARP stainless steel nyloc hex nut kit, 1/4-20 coarse thread, supplied with nylon locking inserts. These nuts combine a standard 1/4-20 hex profile with an integral nylon element to resist loosening under vibration for common automotive and engine fastening applications. Use where a coarse-thread locking nut is preferred to maintain clamp without relying on adhesives or external locking devices.
ARP 1/4-20 SS coarse nyloc hex nut kit
