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实用标准文案
攻丝底孔的使用参数表
一、螺紋下孔徑表
1、公制粗牙螺紋JISB0209-1982(單位：mm螺纹尺寸
钻头直径
螺纹下孔徑
內螺紋小徑最小直径
M1×0.251.1×0.251.2×0.251.4×0.31.6×0.351.8×0.352×0.42.2×0.452.5×0.453×0.53.5×0.64×0.74.5×0.755×0.86×17×18×1.259×1.2510×1.511×1.512×1.7514×216×218×2.520×2.522×2.524×327×330×3.533×3.536×439×442×4.545×4.548×50.750.850.951.11.251.451.61.752.12.52.93.33.84.2566.87.88.59.510.3121415.517.519.5212426.529.5323537.540.5430.78(80%0.88(80%0.98(80%1.14(80%1.32(75%1.52(75%1.65(80%1.83(75%2.13(75%2.59(75%3.01(75%3.39(80%3.85(80%4.31(80%5.13(80%6.13(80%6.85(85%7.85(85%8.62(85%9.62(85%10.40(85%12.2(85%14.2(85%15.7(85%17.7(85%19.2(85%21.2(85%24.2(85%26.6(90%29.6(90%32.1(90%35.1(90%37.6(90%40.6(90%43.1(90%0.7290.8290.9291.0751.2211.4211.5671.7132.0132.4592.8503.2423.6884.1344.9175.9176.6477.6478.3769.37610.10611.83513.83515.29417.29419.29420.75223.75226.21129.21131.67034.67037.12940.12942.587最大直径0.7850.8850.9851.1421.3211.5211.6791.8382.1382.5993.0103.4223.8784.3345.1536.1536.9127.9128.6769.67610.44112.21014.21015.74417.74419.74421.25224.25226.77129.77132.27035.27037.79940.79943.297註(1M1.4以下等級：5H、M1.6以上等級：6H(2基於JISB0209-1982標準

2、公制細牙螺紋-01JISB0211-1982(單位：mm螺纹尺寸M2.5×0.353×0.35精彩文档
钻头直径2.22.7螺纹下孔徑2.22(75%2.72(75%內螺紋小徑最小直径2.1212.621最大直径2.2212.721
实用标准文案
3.5×0.354×0.54.5×0.55×0.55.5×0.56×0.757×0.758×18×0.759×19×0.7510×1.2510×110×0.7511×111×0.7512×1.512×1.2512×114×1.514×115×1.515×116×1.516×117×1.517×118×218×1.518×120×220×1.520×122×222×1.522×124×224×1.524×125×