What instruments are used to measure the internal diameter ...
Apr 01, 2018· Gage pins are ground to size in increments of .001 and are normally bought in sets. Ex: . They also make half thou sets to go in between. Ex: . In general you can get .0005 tolerance. *Pins are only good op to a certain diameter because they become cumbersome to use and are difficult due to the amount of surface contact.