General Description:
Adapter assembly c/o metal wing nut, nipple and chain, for connection to the bourdon design flow gauge; proximal end 3/16 in. Id to 3/8 in. Id tubing to the assemble; internal diameter of the adapter approx 0.141 in.; adapter standard in accordance with the diss of the compressed gas association; distal portion threaded for easy and secure connection into the bourdon flow gauge; chain assembly securely affixed to the center winged portion of the adapter on one end with the free end forming a loop clip which can be opened to secure the adapter assembly to the bourdon flow gauge; metal portions of the adapter, fabricated of a suitable stainless steel, properly hardened and passivated
Dept. of the Army 
Dept. of the Air Force 
Dept. of the Navy