You are reading a single comment by @Scilly.Suffolk and its replies.
Click here to read the full conversation.
-
would you expect BSC to be specified on the die
It would be nice, but the manufacturer's mark matches these BB taps so they obviously made cycle tools.
Also, I was wrong earlier, UNC/UNF/UNEF threads are 60° flank angle, but 1" UNEF are 20TPI anyway so anything 1"×24TPI is almost certainly BSC
1"x 24tpi BSC. Most general engineering shops won't have BSC taps and dies, so you're probably going to have to pay for the die anyway.