Product: Propane Bottle Adapter / Fitting #ME417, 1-20 Male threaded x 1/4" MNPT, internal O-ring and a safety check valve. All Brass. Price/Each.
Features:
Outlet: 1/4" MNPT.
Inlet: 1"-20 Male.
Adapts standard refillable cylinders to a propane hose with a 1/4" FNPT connection.
Inside is a nylon bushing and O-ring to seal to the nipple on diposable propane cylinder fittings or appliances. For example, # F-144 fits onto it.
Inside is a check / Safety Valve.
Brass.
Made in USA.