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 78425 4-1/2" Dia. x 3/8" Coarse DynaBrite Surface Conditioning Disc, 25/pack
Dynabrade 95676 1/4" Female Coupler with 1/4" Male Plug Assembly
Dynabrade 78319 3" Dia. x 1" W x 1/4" Shank, Coarse, NWN DynaBrite Wheel, 10/pack
Dynabrade 98272 1/2" NPT Female Plug
3M 26003, PPS Series 2.0 Adapter, Type S2c, 16 mm Female, 1.5 mmThread, 7100135338
3M 26173, PPS Series 2.0 12-Pack Refill Kit, Standard (22 fl oz, 650mL), 200 Micron Filter, 7100166278
Norton 66261014936 3" DIA X 1/8" Thick, Bear-Tex NEX Rapid Blend Quick-Change Type III Non-Woven Unified Wheel, 40 Each
3M 14895, Cloth Belt 777F, 80 YF-weight, 1 in x 42 in, Film-lok, Single-flex, 7010299926, 200 per case
Dynabrade 95677 1/4" Male Plug with 1/4" NPT Female Thread
Insize 1179-600, DIGITAL RTJ RING GROOVE CALIPER, inside diameter of RTJ ring groove .4-24"/10-600mm, outside diameter of RTJ ring groove 1-24"/25-600mm, 6928640302572 