For zero setting of inside micrometers, three points internal micrometers and bore gages.
Deviation is the difference between the ordered size and the size marked on the setting ring when supplied.
For example, the ordered size is .2”, the size marked on the setting ring when supplied may be .20008″.
setting ring when supplied may be .20008″.

Dynabrade 95746 3/8" NPT Speed Regulator
Dynabrade 95676 1/4" Female Coupler with 1/4" Male Plug Assembly
3M 16580, Accuspray ONE Spray Gun System with Standard PPS, 7100099202
3M 26120, PPS Series 2.0 Adapter, Type S28, 17.5 mm Female, 19 TPI
Thread, 7100135956
Insize 4120-18N, METRIC THREAD RING GAGE, NO GO, M18x2.5, 6928640341816
3M 01875, Charge-Collection Solar Tape 3011, 2 mm x 1200 m, 7010312686
Dynabrade 97570 1/2" NPT Female Safety Coupler 