Technical Data:
Series: 177
Product type: Setting Ring
Application: Reference setting of dial bore gages, Holtest and inside micrometers
Actual diameter marking: 10 uin / 0.001 mm increments
Diameter calibration position: Center of height T
Standard: Mitutoyo factory reference-setting standard; not ASME B89.1.5 classification
Cylindricity evaluation: Three cross-sections, near each side face and at the center
Material: Steel
Nominal inside diameter d: 90 mm
Type: A
Maximum variation between nominal and actual marked diameter: +/-20 um
Uncertainty of marked diameter value: 1.5 um
Roundness / cylindricity: 1.5 um

Dimensions:
D=Dia.140 mm
E=-
T=25 mm
H=4.2 mm
K=16.6 mm