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.

Dynabrade 78122 2" Dia. Medium NWN DynaBrite Locking-Type Disc, 25/pack
Insize 2307-1R, REVERSE READING DIAL INDICATOR, 1", lug back, 6928640396649
3M 71358, 641WY 1/4" X 24", 600 Mesh Diamond Cloth Belt, 7010534894
3M 76631, Roloc Disc 777F, TR, 3 in x NH, 36 YF-weight, 7000028339 