Wacker Neuson 5000176445 Lock Nut 1 NPT, Steel

The Wacker Neuson Lock Nut 1 NPT, Steel is a genuine OEM component designed for the HI260 and HI1000 indirect-fired air heater series and the LTN6C-P, LTN6L-P, LTW6K, LTW8K, LTW20Z-1, and LTW20Z-3 light tower series. Sourced directly from Wacker Neuson, this steel lock nut carries the same part number and specification used in original production. If your heater or light tower requires a secure, leak-free threaded connection at a 1 NPT fitting point, part is the correct replacement to restore the installation to its original condition.

Key Features

• Steel Construction for High-Torque Retention — Manufactured from steel to withstand the clamping loads and vibration exposure common in portable heater and light tower applications, maintaining thread engagement over repeated service cycles.
• Correct 1 NPT Thread Form — Matches the 1-inch National Pipe Thread standard used at the fitting junction, ensuring the nut seats and locks without the cross-threading risk that comes with non-spec hardware.
• Genuine OEM Part — Supplied as a Wacker Neuson OEM component under part number 5000176445, meaning it is built to the same specification as the nut installed at the factory.
• Broad Cross-Family Fitment — Confirmed for HI260 and HI1000 indirect air heaters and the LTN6 and LTW light tower families, covering both gasoline, diesel, and DGM heater configurations as well as multiple light tower engine configurations.
• Fuel and Fluid System Integrity — A properly torqued lock nut at an NPT connection prevents fluid or fuel seepage in the heater circuit; a loose or stripped nut at this point can result in leaks that affect heater output and create a fire or fluid-loss hazard.

A lock nut used at an NPT threaded fitting serves as the secondary securing element that prevents the primary fitting or valve body from backing out under vibration, thermal cycling, or pressure fluctuation. In indirect-fired air heaters such as the HI260 and HI1000, maintaining a tight, sealed connection in the fuel and fluid circuit is critical to consistent heat output and safe operation. In light tower applications, the same fitting integrity is required wherever fluid lines are routed through threaded connections on the generator or engine sub-frame. When a lock nut strips, cracks, or loses its clamping ability, the joint can loosen gradually, leading to weeping connections or full joint failure that takes the machine out of service.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

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