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Enter any two drills (#7 vs 13/64) or any two threads (1/4-20 vs M6×1, including across systems). Differences are computed at full precision.

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Data provenance. ASME B94.11M, Twist Drills (standard drill size series) (ASME). ASME B1.1, Unified Inch Screw Threads (ASME). ISO 261 / ISO 724, ISO general purpose metric screw threads (ISO). See all data sources.