These industrial-strength Grade C NU Heavy Nylon Insert Locknuts are built to perform in environments where vibration and movement are constant. A nylon insert inside each nut grips the threads of the mating fastener, acting as a lock that resists loosening without the need for adhesives or washers.

Made from durable Grade C steel with a plain (uncoated) finish, these locknuts are designed for indoor use where corrosion isn’t a factor. The coarse threads allow for faster starts and better resistance in materials prone to stripping. These heavy nylon locknuts are applicable with our A307 hex bolts and threaded rod.

Key Features:

• Built-In Nylon Insert: Helps prevent loosening caused by vibration or torque.
• Heavy-Pattern Strength: Grade C steel offers rugged holding power.
• Coarse Threads: Easy to install and ideal for general-purpose structural applications.
• Available in Multiple Sizes: Choose from a range of diameters for your specific needs.

Common Applications:

• Machinery assembly and maintenance
• HVAC system installation
• Indoor equipment mounts and frames
• Light manufacturing and industrial build-outs
• Structural bolting where movement and vibration occur