1/2" NPT Pipe Thread Allen Socket Pipe Plug Fitting Specs Made of Steel then zinc plated.
3/8" NPT Pipe Thread Allen Socket Steel block off x 100 Pipe Plugs
Industrial Water Pressure Pump - 1/2"NPT Pipe Thread Port Water Diaphragm Pump
1/2"NPT Pipe Thread Port Water Diaphragm Pressure Pump Pressure Switch
