About this item 1/2″ Male National Pipe Taper (NPT) threads on male threaded pipes and fittings (This is NOT 1/2″ standard thread) .5 inch NPT female nut, threaded used for BBQ Thermometers, Plumbing, Electrical, Industrial etc Pipe fittings are components used for connecting, terminating, controlling flow, and changing the direction of piping in many different industries.