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″.
Related products
Measuring/ Inspection Instruments
Insize 4120-10, METRIC THREAD RING GAGE, GO, M10x1.5, 6928640341458
$64.03

Dynabrade 78599 3/8" Dia. x 2" W x 1/8" Center Hole, 80 Grit, 100/pack
3M 96676, Scotch Indoor Fasteners, RF4721, 7/8 in x 7/8 in (2,22 cm x 2,22 cm),Black, 12 Sets of Squares, 7100110928
Dynabrade 91425 1/4" W x 12" L 60 Grit A/O DynaCut Belt, 50/pack 