I was able to get into my Medical Ben Hur today and unpack it to get to the food box located on the bottom....My appologies for the delay.
The following are pictures of the bucket latch. Being from the "Colonies" I could not find my tape measure with metric indicators so I had to use an imperial tape.
The latches are made of 3/32 steel rod (notice the rust). The inside clearance dimension is 1/2 inch on all (pic #5). The length of the side which hooks to the boss is 3/4 of an inch (pic #4). The overall length of the latch on the side oposite the mount is 7/8 of an inch (pic 3).
I left the tub out so I can take any further images needed. (Note these are reduced to expedite loading. If you need hi-res pleas email me).