I highly recommend buying taps and dies from Greg Ricketts at 'A Plane Life'.
Not only is he well versed on Stanley tools (and very nice guy), his tools are
all Made in the US and are top quality. The last time I bought a #12-20 tap from
Victor Machinery, it was sourced from an overseas company. I'm afraid to use it.
Just my two cents....
In da U.P. of Michigan
On Tuesday, September 20, 2022 at 11:44:19 AM EDT, Kevin Foley
12-20s plus all the weird Stanley taps and dies such as left-handed adjuster
hardware are available here:
Kevin in Chantilly