the 2-56 tap is probably a unc form thread - 56 tpi - tapping drill is number 50 gauge drill. as to thread classification of the other tap I assume it could be a unf form thread, refer to a unc/unf tap ref.chart.I have some micro taps like 3x48 2/56 and such if you can't see what they are is there a screw card or something you can identify them with.
Thanks
back again, regards to the 3-48 tap is a num. unc classification british thread , the American equivalant is 3 x 48 tpi -anc . 2-56 tap is a num. unc classification british thread , the American equivalent is 2 x 56 tpi - ancI have some micro taps like 3x48 2/56 and such if you can't see what they are is there a screw card or something you can identify them with.
Thanks
Your tap is not a micro tap. This one is. I have a set of them. The tap is 0.30mm diameter, .075mm pitch. That's .0118" diameter and .0029" pitch. This is the smallest one in the set that goes up to 1.20mm and .25mm pitch or .047mm diameter and .009.