Quote:
Originally Posted by Bruce Parker
BSF tap and dies sets are available quite easily. BSF is the same as 'NF' except the pitch of the threads is 55 degrees instead of 60.
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Not sure what you mean by "is the same". None of the threads per inch (TPI) match between BSF and UNF.
I will agree that any of the BSF, BSW, or BA threads are easily available on ebay as well as other sites. Even left hand threads can be found with a bit of effort.