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 05010, Cloth Belt 384F, 120+ XF-weight, 1/4 in x 24 in, Fabri-lok, 7100141428, 200 per case
3M 19079, E-A-R TaperFit 2 Probed Test Plugs 393-2006-50, 50 EA/Case, 7000002388 