Marine Fasteners RP-1573 Nylon Insert Lock Nut - 1/2-13 50-Pack

Marine Fasteners RP-1573 are 1/2-13 UNC nylon insert lock nuts, supplied in a convenient 50-piece pack. These prevailing torque lock nuts feature an integrated nylon collar that grips the bolt threads to resist loosening caused by vibration, shock, and dynamic loading—making them ideal for marine, powersports, RV, and general fastening applications.

Key Features:

• Thread size: 1/2-13 UNC (Unified National Coarse)
• Type: Nylon insert prevailing torque lock nut (also known as a nylock nut)
• Nylon insert grips bolt threads to prevent loosening from vibration
• Pack quantity: 50 pieces
• Suitable for marine, automotive, RV, and industrial applications
• Reusable design allows for disassembly and reassembly

Nylon insert lock nuts are a proven, cost-effective solution for vibration-resistant fastening. The nylon collar deforms slightly around the mating bolt threads, creating a secure interference fit that maintains clamping force without the need for additional thread-locking compounds. Each RP-1573 pack includes 50 nuts, making it well-suited for bulk repair, maintenance, and fabrication projects.