Sandvik Hex Nut Zinc M20 2 50

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Normal tap tolerance is iso 2 6h, which generates an average quality fit between screw and nut.Lower tolerance iso 1 generates a fine fit without a gap on the flanks between screw and nut.Higher tolerance iso 3 generates a rough fit with a large gap.This is used if the nut is coated, or if a loose fit is preferred.

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