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November 25, 2010 at 11:24 am
#50384
Hi Jdross99,
Yes they do differ in many cases.
I use screw plates to determine thead sizes.
I also use a comparison list that Ian Wright compiled that is available on his website as a pdf download. Also when you get there check out the watch he made if you haven’t already.
His URL is:
http://www.watchman63.co.uk/thread.html
Have fun and Happy Thanksgiving!
Bob