Maid O' Mist 9AS Air Vent Shortstop

Air Vent Shortstop; Item Shortstop; Type Automatic Shut-Off, Spring Loaded; Size 1/8 Inch Male Threaded; Used On Item Float Operated Convector Radiator/Baseboard Radiation/Radiant Panel Air Vent; Used On Model/Brand Auto-Vents; Used On Item Part No 66, 67, 78