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.

Insize ISY-700-90030, ACRYLIC BASE PLATE, 6940561980875
Standard Abrasives 709966, A/O Tapered Cone Point, B-20 180, 7010368591, 100 per case 