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Beats me why it's different. I will try and find out. It probably stems from the Railroads, like British Cars, do things their own way, and by God, nothing will change that. (I own, and work on,British Cars and run into the same sort of question). I am sure that at some point there was a long study on torque and holding power and electrical conductivity and speed of installation, or maybe the hardware salesman scored a big sale of some oddball stuff he had in the warehouse and once that was used up they had to stick with it.

I do know the nuts are a design that I have seen nowhere else, and are designed to be used in pairs, as in a second torqued down on the first as a safety. The nuts in the picture go on the bottom, under whatever is mounted to the junction, and then the special ones hold the device to the block.
I will see if I can get pictures. but I have said that before, so we will see if I can get that done.

TW

edited the spelling [Linked Image]

[This message has been edited by Trainwire (edited 11-30-2004).]

[This message has been edited by electure (edited 11-30-2004).]