Shutoff Valve, 1/4" MPT X 1/4" MFL w/ Check Valve

Insert this shutoff valve into a CO2 regulator, Wye splitter, or air distributor and then attach a 1/4" or 5/16" swivel nut and stem to it, which allows you to hook up gas line to the shutoff valve.

Has a check valve and a manual shutoff, so you can shut the flow off if necessary.