AIR HOSE COUPLING 3/8IN FEMALE (NPT THRE

Standard 3/8 inch NPT threads are about as common as it gets in air systems, so the female thread on this coupling should mate up with the vast majority of air hoses and tools running that same thread size. No adapter needed in typical setups. The two-lug design also locks in a solid connection once you get it seated, so you're not dealing with a loose fit or having to fiddle with extra seals to get things working right.