Automotive NPT Adapter Fittings, Reducer Fittings, Couplers & More

NPT reducer fittings (as well as other types of NPT connectors), when combined with thread sealant or thread sealing tape, provide a leak free connection for your fuel, oil, transmission, coolant, or other low-pressure vehicle systems with a solid design.

Upgrading older NPT fittings provides the next level of detail when opening the hood on your street or race vehicle. Available in brass, steel, stainless steel, and aluminum, NPT reducer bushing, union, and reducer fittings are manufactured in different finishes such as polished, anodized (for example, blue or black), or chrome.

A NPT coupler is a short union connection, which joins two NPT fittings together. Typically, couplings have female connections on both ends, but can also be male for each side, sometimes referred to as a NPT union "nipple".

A NPT air coupler is a connector designed to work with air tools. It has NPT male or female threads on one end, connecting to the air tool. On the other end is a quick-release hose fitting, which allows the air tool to be disconnected quickly with just a pull on the hose coupler ring.

NPT couplers are necessary components when plumbing a fuel, coolant, oil, transmission, vacuum, or other low-pressure system. They provide a strong and leak-free seal for long service life. Complete your next street or racing automotive project with NPT reducers, couplers, and connectors from JEGS.