Prime‑Line® K‑Lock nuts provide superior vibration‑resistant fastening for applications where a secure, long‑lasting hold is essential. Designed with an attached external toothed lock washer, these nuts bite into the mating surface as they are tightened, helping prevent loosening caused by movement, shock, or repeated use. Ideal for automotive repairs, appliances, machinery, electrical components, and general mechanical assemblies, Prime‑Line K‑Lock nuts are intended for use with same‑size matching bolts or machine screws for proper fit and consistent locking performance. Manufactured from quality materials for strength and durability, they install easily with standard hand tools and eliminate the need for a separate washer. Trusted by DIY homeowners and professionals across the U.S., Prime‑Line K‑Lock nuts make it easy to achieve fast, reliable, and vibration‑resistant connections.

Goods are warranted against manufacturing defects for 1 year. In no case is Prime-Line responsible for user related damage or damage incurred during installation. Warranty is void if products are subjected to abnormal conditions, misapplication or abuse.