建議下孔徑 mendedTapDrillSizes◎公製牙NominalSizeDrillSize(mm)D1(mm) NominalSizeDrillSize(mm)D1(mm) ()()()() *M6 x1M7 *M7 ()()()()()()M8 x1M8 *M8 * ()() x1M9 *()()()() * x1M11 * x1* x2M14 x1M15 x2M16 x1M17 ●mendedtapdrillsizesindicatedaboveareforJISClass2Metricthreads.●D1:MinordiameterofJISClass2internalthread. But,theminordiametersD1shownin()areofJISClassIinternalthreads becausetheirnominalsizesarenotspecifiedinJISClass2.●*Markedsizeshavebeeneliminatedfrom
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