Lock Nuts

Prime‑Line® lock nuts are designed to provide secure, vibration‑resistant fastening for applications where maintaining tight connections is critical. Featuring a built‑in locking element that helps resist loosening from movement or repeated use, these nuts offer a dependable solution for automotive repairs, appliances, lawn and garden equipment, furniture, and general mechanical assemblies. Prime‑Line lock nuts are intended for use with same‑size matching bolts or machine screws to ensure proper thread engagement and reliable holding power without the need for additional locking hardware. Manufactured from quality materials for strength and durability, they install easily with standard hand tools and deliver long‑lasting performance. Trusted by DIY homeowners and professionals across the U.S., Prime‑Line lock nuts make it easy to complete projects with added security, stability, and confidence. Prime-Line Size: 6.05" H x 3.9" W x 0.45" D