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 4112-CD6, INDIVIDUAL STEEL GAGE BLOCK, .6", grade AS-2, 6928640353574
Dynabrade 15336 Rubber Drive Wheel 