Nylon Insert Locknut – Stainless 5/16-18

Secure connections with this stainless nylon insert locknut sized for 5/16-18 threads. The nylon insert adds resistance to loosening from vibration, making it a practical choice for marine fastener applications.

Key Features

• Nylon insert helps resist loosening from vibration
• Stainless steel construction for corrosion resistance
• 5/16-18 thread size for compatible hardware

Intended Use

• Marine fasteners and general mounting hardware
• Typical boat and watercraft assemblies where thread locking is beneficial
• General mechanical fastening applications requiring a nylon insert locknut

Product Details

• Product: Nylon Insert Locknut – Stainless 5/16-18
• Finish/Material: 18-8 stainless steel
• Thread Size: 5/16-18
• Product SKU (variant): 50-00626
• Weight (per variant): 340 g

Parts Desk Insights

Best Use Case: Use as a thread-locking nut on studs or bolts where vibration may work fasteners loosecommon in marine hardware and other equipment exposed to movement.

Common Issues: If a locknut feels overly tight to install, verify thread pitch (5/16-18) and that mating threads are clean and undamaged; cross-threading can damage both the nuts threads and the nylon insert performance.

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• Fasteners & Mounting – Browse the Fasteners & Mounting collection for additional nuts, bolts, and lock hardware.