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 05009, Cloth Belt 384F, 120+ XF-weight, 1/2 in x 24 in, Fabri-lok, Full-flex, 7100141427, 200 per case
3M 19080, E-A-R Classic Probed Test Plugs 393-2007-50, Small Size, 50 EA/Case, 7000052884 