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 45018, Diamond Grade DG3 Reflective Digital Sheeting 4091UDS,Yellow, 24 in x 50 yd, 1 Roll/Case, 7100282695
Dynabrade 98265 3/8" Female Coupler with 3/8" Male Plug Assembly
3M 10118, Synthetic Steel Wool Pads, 10118NA, #0 Fine, 7000126148
3M Super Abrasives Roloc Disc, 2" Type-R, Medium AO High Strength, Box of 50
3M 76630, Roloc Disc 777F, 50 YF-weight, TR, 2 in, Die R200P, 7000045627
Dynabrade 51731 .1 hp Straight-Line Pencil Grinder, 60,000 RPM, 1/8" Collet
3M 64324, Foil Tape 3340, Silver, 72 mm x 45.7 m, 3.9 mil, 7010335734
Dynabrade 53533 Cone or Plug Grinder (Triple Extension)
3M 85492, Scotch Foil Tape 3311-10A, 2.0 in x 10 yd (50.8 mm x 9,1 m), 7010383663 