Bottom bracket threads are NOT uniform:

English and french threaded , (normally 68mm wide) have right hand thread on the right hand of the bike, (fixed cup), left hand thread on the left of the bike adjustable cup.

Italian threaded, (normally 70 mmm wide) have right hand threads on BOTH sides of the bike.

NOTE:
If you ruin the threads on your english or french threaded bottom bracket you can save it by rethreading it with an Italian thread cutter!!! The Italian system uses slightly larger inside diameters. After rethreading to Italian just use Italian cups and an English spindle