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.

3M 13182, Scotch-Brite Multi-Finishing Wheel, MU-WL, 2S Coarse, 8 in x 1 in x 3 in, 7000120806 
