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Russian Federation
making threads on H=D and H=0.8*D hex nuts: Metric threads from M10 to M36 with the main (coarse) thread pitch, tolerance class 6H (for all listed thread diameters). Also inch threads from 1/2 to 1 inch UNC series, and inch threads of the 8UN series from 1 1/8 inch and above. Tolerance class 2B.
Russian Federation
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