[TR] TR3 Dash gauge knurled nuts

[cfmtr3a at verizon.net (Carl TR)]

Ok - thought I had them all - but missing two. 

Does anyone know the thread size of the knurled nut on the back of the small
gauges on the TR3? Or alternatively - would happen to have two they can
spare?   Or know of a source?

Evidently the rebuilt temp gauge didn't come back with them (not even sure
if they were sent along with the core for the rebuild - too many years ago)