Mitutoyo 516-946-26 87pc Metric Grade 0 Steel Rectangular Gage Block Set

The Mitutoyo 516-946-26 is a new, 87-piece metric rectangular steel gauge block set, Set No. BM1-87-0A/A, manufactured in Japan and certified to ASME Grade 0 accuracy per ASME B89.1.9-2002 — one grade above the workshop-grade Grade 1, making it suitable for inspection room and laboratory-grade dimensional measurement. The set covers a metric range from 1.001 mm through 100 mm across multiple series: the first row provides 0.001 mm step blocks (1.001–1.009 mm, 9 pieces), the second 0.01 mm steps (1.01–1.49 mm, 49 pieces), the third 0.5 mm steps (0.5–9.5 mm, 19 pieces), and long blocks covering 10–100 mm (10 pieces), plus 2 wear blocks — totaling 87 pieces. All blocks are lapped-steel construction with wringing surfaces conforming to Grade 0 tolerances, and each set ships with a Mitutoyo Certificate of Inspection (Certificate No. S24G00636, dated 31 July 2024) traceable to national standards; blocks are housed in a fitted hardwood case with individual slotted holders to prevent contact damage during storage.

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