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ISO general purpose metric screw threads — Tolerances — Part 6: Limits of sizes for internal and external threads (fine and medium tolerance qualities, first and second choices)
This document specifies the limits of sizes for major, pitch and minor diameters of ISO general purpose metric screw threads (M) conforming to ISO 261 and having basic and design profiles in accordance with ISO 68-1.
This document is applicable to the metric fastening screw threads with the ten tolerance classes (4H, 5H, 6H, 7H, 6G, 4h, 6h, 6g, 6f and 6e) recommended in ISO 965-1.
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