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 45016, Diamond Grade DG3 Reflective Digital Sheeting 4091UDS,Yellow, 36 in x 50 yd, 1 Roll/Case, 7100282696
Dynabrade 95675 1/4" Male Plug with 1/4" NPT Male Thread
3M 26120, PPS Series 2.0 Adapter, Type S28, 17.5 mm Female, 19 TPI
Thread, 7100135956 