early sprite lug nut size

Any of you have handy an early sprite lug nut to measure for me? This is
the thru-nut kind, not the closed chrome nut used on the later rostyles
(I got a bunch of those!). I'm looking for overall height and width
across the flats.

The reason I'm asking for this is I'm trying to design a bolt-on 4x100mm
adapter for the Spridget hub, and the height of the nut will determine
if it can work or not.

Thanks!

-=Chris

Chris King
http://home.comcast.net/~kvcbk/