No.5 rear tow hitch size

[P6X6]

Hello all,
Can someone please tell me the inside diametre of the the rear tow hitch on the No.5 trailer and the depth from the plate welded inside to the tip of the tounge. Or, even better, if someone knows where to scourse the "donuts" that fit in the rear tow point for training. I'll try and attach some photos

[Marlin]

Just been out to the shed with the tape measure. Welded plate to tip of tongue is 120mm. Distance between jaw tips (diameter) is 90mm. Hope this is what you were after.

[P6X6]

Thanks very much Marlin !!! I'll post up my creation.
Oh, maybe one more measurement, tip of the tounge to the centre of the pin.

Thanks again for all your help !!

[Marlin]

Thanks very much Marlin !!! I'll post up my creation.
Oh, maybe one more measurement, tip of the tounge to the centre of the pin.

Thanks again for all your help !!

35mm

[P6X6]

So this is what I made up

[boxy]

What does this do that the welded on connection point do??

[Diana Alan]

And where will it be legal to tow multiple light trailers like the No.5?