Used with standard outside micrometers with spindle .256″DIA to measure pitch diameter of screw threads.
Diameter accuracy: ?20_in. Cylindricity: 39_in.
Cylindricity: 1um. Hardness: HRC60.
Supplied with manufacturer inspection certificate.
Supplied with manufacturer inspection certificate.

Insize QMY-AP32-U, ROTATIONAL ABRASION TESTER, 6940561937848
3M 56788, Stacked Lens Cover FF-400-18, 7010385198 