03-03-2022, 08:07 PM
(This post was last modified: 03-03-2022, 08:15 PM by Steve Jones.)
Just measured one, Ruairidh, and it was 1 1/4" x 20 tpi. Tracy Tools web site lists both taps and dies in that size - BSC Thread - but no stock of taps, only carbon dies.
Steve
Steve