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 33440, Cubitron II File Belt, 33440, 80+, 10 mm x 330 mm (3/8 in x 13 in), 7100033195, 10 belts per carton, 5 cartons per case
3M 93748, No Touch Probed Test Plugs, 393-2013-50, 50/PR, 7100033339
Dynabrade 51301 .5 hp Straight-Line Die Grinder
3M 01875, Charge-Collection Solar Tape 3011, 2 mm x 1200 m, 7010312686 