Yes they are for hand pumps, and are attached via a fine thread (the vendor did not know what size the thread is) - I asked recently.
The thread is 1/4 BSG IIRC
I believe I even have tap and die set left over from plumbing an historic house for gas lighting, but British Standard Gas is not a thread form you will run into every day.
Those were the days screwed and soldered copper pipe with a wall thickness nearly equal to the bore.
Mark