Mitutoyo 177-303 Setting Ring for Holtests and Bore Gages, 7" Size

Item Description Size: 7" Accuracy: ±.00008" ØD = 260mm ØE = 215mm T = 38.1mm Type = B Tolerance between nominal size and actual diameter = +/- 0.0008" Uncertainty of unmarked diameter value = +/- 0.00010" Roundness/cylindricity = 0.00010" Distance from side face H = 5mm Size warranted calibration surface K = 28.10mm Used for quick zero adjustment of dial bore gages, Holtest, and inside micrometers Actual inside diameter is marked on each ring Made in Japan With protective casing