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 03140, General Purpose Sanding Sponge CP041-6P, Single Angle, 2-7/8 in x 4-7/8 in x 1 in, Medium, 7100101537, 6/pack
Insize 6144, ACCESSORY SET FOR DIGITAL CALIPERS, 6928640380839
3M 05580, Cloth Belt 577F, 80 YF-weight, 1/4 in x 24 in, Fabri-lok, Full-flex, 7010361594, 200 per case
Dynabrade 97571 1/2" NPT Male Safety Coupler
3M 77157 Scotch-Brite Durable Flex Belt, 77157, 1/2 in x 18 in, A MED, Trial Pack, 7010365702
3M 54137, Scotch-Brite, Roloc AL Surface Conditioning Disc TR, 2 in x NH A CRS, 7100075554, 200 per case
3M 29859, Sanding Screen, 100 grit, 12 in x 18 in, 7100160861 