Stainless Steel Union coupling 1/8″npt thru 2″npt size metal seat seal
” STAINLESS STEEL UNION COUPLING “. -Quantity 1PC STAINLESS STEEL UNION COUPLING. ” NPT THREAD “. -FEMALE NPT THREADS. – (SEE ATTACHED CHART REFERENCING NPT SIZING). National Pipe Threads (NPT). for tight joint.