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: 275 mm
Type: B
Maximum variation between nominal and actual marked diameter: +/-20 um
Uncertainty of marked diameter value: 3.0 um
Roundness / cylindricity: 2.5 um

Dimensions:
D=Dia.413 mm
E=Dia.321 mm
T=38.1 mm
H=5.3 mm
K=27.5 mm