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In terms of OH accuracy, if one number goes up, how much will it be oversized?
P0.6 or less is 15 μm, and P0.7 or more is 20 μm.
In forming tap , it is 12.7 μm over. ( In forming tap , the expression of tap precision is RH precision.) ）
Currently, the standard tap accuracy for aiming for the equivalent of grade 2 is "STD" (standard).
For that "STD", +1 or +2 is used to express the above oversize amount in stages.
