3/8" NPT National Pipe Tapered Thread Steel Allen Plugs
NPT - National Pipe Tapered thread. Always remember that pipe thread fittings are measured INSIDE diameter not outside diameter of the threads. See diagram at bottom of this page.
NPT - National Pipe Tapered thread. Always remember that pipe thread fittings are measured INSIDE diameter not outside diameter of the threads. See diagram at bottom of this page.
