master gage

master gage

[′mas·tər ′gāj]
(design engineering)
A locating device with fixed hole locations or part positions; locates in three dimensions and generally occupies the same space as the part it represents.
References in periodicals archive ?
The KOBA-step Mini master gage monitors the accuracy of CMMs.
Yes, there are collet chucks that you can buy that run off master gages.