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″.

3M 26109, PPS Series 2.0 Adapter, Type S23, 1/4 Female, 18 Thread NPS, 7100135941
3M 26128, PPS Series 2.0 Adapter, Type S33, 1/8 Female, 27 Thread NPT, 7100135950
3M 33057, Scotch-Brite Radial Bristle Brush Replacement Disc, BB-ZB, 220, Type C, 6 in, Refill, w/o Adaptor, 7100138302
Insize 0130-L110, LIGHT METER (BASIC TYPE), 6974029776564
Dynabrade 78587 1/4" Dia. x 2" W x 1/8" Center Hole, 60 Grit, 100/pack
3M 08188, Flex Pack Nozzle, 25 per carton, 7000119729 