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  • looking for someone to confirm the spec or the dies regardless of colour.

    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.

  • 1"x 24tpi BSC. The thread form is cycle-specific, don't try to wing it with a 1" x 24 UNF...

    This is advertised as being for bike forks: would you expect BSC to be specified on the die, ie assume UNF if it doesn't say otherwise?

  • 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

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