Mystery towbar adapters

[cranetruck]

I'm curious about these adapters, the universal ends fit the M35 (1" pin) and the M37 (3/4" pin) among other. The other end is the problem, it needs a gap opening of 1-7/8" and a pin 1-1/8" in dia. They will not fit the "medium" towbars that I have nor do they match up with the heavy 80" towbar male ends.

Any thoughts on this would be appreciated since I now have parts for four different towbars and not one complete.

 

[rdixiemiller]

Bjorn
Not sure what they fit, but I milled one down to fit and made a bushing for the hole. It now resides on my medium towbar.

 

[ida34]

My towbar has these ends. It is an older bar. I will try to remember to measure them to see if the are exactly like the ones you have.

 

[dilvoy]

Those adaptors are for the small military towbar setup.

 

[cranetruck]

Dilvoy, got any references?