I have a "Card's Improved Screw Plate" tap wrench set with 3 dies: 1/4"-20 and 2 other ones that appear to be marked 14-20 and 16-20. An AI-assisted search determined that the 14-20 was for a #14 screw, now obsolete, and would make a very tight-fitting 1/4-20. It also determined that the 16-20...