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ARP stainless steel nyloc hex nut kit, 1/4-28 fine thread with a nylon locking insert. These nuts combine a fine-pitch 1/4-28 thread with an integral nylon element to help resist loosening under vibration. The hex profile provides familiar wrench engagement for installation. Use where fine-thread locking is required in engine or mechanical assemblies and a nylon lock feature is preferred.
ARP 1/4-28 SS fine nyloc hex nut kit
