Nothing special about the thread or tap. It is 1" x 16 tpi British Standard Conduit. 55 degree Whitworth thread form.
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fitted mine and am impressed :p
http://www.aulro.com/afvb/attachment...1&d=1326840026
I'm in for a couple when you have the next lot done Inc
Perry
Cheers Paul
if i had a small lathe i would have but i dont have so i didn't :P
Is it too late to order two sets?