L.H. DOTTIE LN150 Conduit Locknut 1-1/2 in Threaded Steel Zinc Plated

What this locknut does

The L.H. DOTTIE LN150 is a 1-1/2 inch threaded steel locknut with a zinc-plated finish. It secures rigid or intermediate metal conduit to enclosures, boxes or fittings in electrical installations. Electricians and maintenance crews use it to create a mechanically sound, grounded connection point.

Thread standard and corrosion resistance

The locknut follows the 1-1/2 inch trade-size thread pitch used on North American conduit fittings. Zinc plating provides a sacrificial barrier that slows rust on the steel body in dry or damp indoor locations. It is not rated for direct burial, prolonged outdoor exposure or chemically aggressive atmospheres without additional protection.

Check conduit type and enclosure threading

Verify that the conduit or fitting you are terminating carries the same 1-1/2 inch thread designation before ordering. Confirm the enclosure or box entry is tapped for the matching thread form so the locknut can engage fully. Orders of 75 or more may ship free from the manufacturer, but the fit must be correct regardless of quantity.