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.

Standard Abrasives 850029, Unitized Mandrel, 1/4 in Shank, Combo, 7000121642
Insize ISY-300-1, BASE PLATE, 6940561974775
Dynabrade 11005 Dynafile Belt Housing Guard
Dynabrade 01185 Vane Set (4pk) 