BRASS ADAPTER 3/4 X 1/2

This brass adapter steps down a 3/4in NPT fitting to a 1/2in NPT connection. It's commonly used on air, fuel, and lubrication lines on heavy-duty trucks and trailers where two different pipe-thread sizes need to mate. Brass construction resists corrosion and holds a reliable seal under the vibration and pressure cycling of daily fleet use.

United Truck Parts keeps this fitting in stock in Pennsylvania for fast shipping along the I-78 corridor, serving fleets, owner-operators, and repair shops nationwide. If you're unsure this is the exact fitting you need, reach out with your old part number or a photo and we'll help you match it — financing is available for bulk orders.