Technical Data:
Series: 167
Product type: Setting Standard for Outside Micrometer
Application: Setting the zero point on outside micrometers
Length: 25 mm
Accuracy: +/-1.5 um
Parallelism: 2.0 um
Flatness: 0.3 um

Dimensions:
Length L=25 mm
Reference length ell=18 mm
Diameter D=6.35 mm
Front reference dimension=11 mm; hex-end width=12.7 mm