At an airpark garage/estate sale. Bought a boxO'cwap because it had two clamps in it. They are about 1 3/8" by 5 5/8" and 5 1/8" interior diameter. Brass.
I believe it is a pipe clamp to join another piece of pipe. Fire hose has those connection to connect fabric fire hose to another link of fire hose together. They are self-locking quick connection for water hose that is why they are brass.
I have some that are aluminum that are basically the same thing for irrigation pipe.
Just my observation of the picture you posted.
My first guess too.first thing I thought was an oil filter wrench, but doubt they come in brass
I believe it is a pipe clamp to join another piece of pipe. Fire hose has those connection to connect fabric fire hose to another link of fire hose together. They are self-locking quick connection for water hose that is why they are brass.
I have some that are aluminum that are basically the same thing for irrigation pipe.
Just my observation of the picture you posted.
Well, they hook them up to fire hydrants from blooks away for more water capacity.Suspect you've nailed it but aren't finding it and think that is very large diameter hose - do firetrucks run 5+" lines? Clamping diameter is fixed, not adjustable.
I recall these in this size (5 or 6 inches) when I worked in a factory in the summers in the 70's. Quick and temporary connect for pipes that needed to be taken apart frequently to be cleaned. The gunk that they spun fiberglass insulation with was thick and the inside of the pipes were narrowed after awhile.Suspect you've nailed it but aren't finding it and think that is very large diameter hose - do firetrucks run 5+" lines? Clamping diameter is fixed, not adjustable.