Relax...thats the thread pitch of the studs.
Stud thread diameter is 12mm wide and 1.5mm from thread to thread
The other is 12mm wide also but a finer pitch of 1.25mm between threads.

Check the actual pitch of YOUR studs so you have lugnuts that match


91 Montero LS,3.0L,auto,off road pkg.
89 Trooper S,2.6L,5 spd
07 Dodge Ram 2500 4x4,5.9L Turbodiesel,6spd
"Non Vi Sed,Arte"