8/H8/5（4/H）H）H3（2dd1d1D2DーJIS B 0205（2001）より抜粋ー30ﾟ90ﾟ3欄2欄1欄M 1P8/HDP 太い実線は、基準山形を示す。ピッチ30ﾟP/8めねじ有効径60ﾟおねじP/2P/4ねじの軸線0.250.250.250.30.350.350.40.450.450.50.60.70.750.8111.251.251.51.51.75222.52.52.5333.53.5444.54.5555.55.566 （1）1欄を優先的に、必要に応じて2欄、3欄の順に選ぶ。M 9M 11基準寸法の算出に用いる公式H＝0.866025404P 5/8H＝0.541265877Pd2＝d−0.649519Pd1＝d−1.082532PD＝dD2＝d2D1＝d1単位：mmねじの呼び（1）ひっかかりの高さ谷の径D1172M 1.1M 1.2M 1.4M 1.6M 1.8M 2M 2.2M 2.5M 3M 3.5M 4M 4.5M 5M 6M 7M 8M 10M 12M 14M 16M 18M 20M 22M 24M 27M 30M 33M 36M 39M 42M 45M 48M 52M 56M 60M 64M 680.1350.1350.1350.1620.1890.1890.2170.2440.2440.2710.3250.3790.4060.4330.5410.5410.6770.6770.8120.8120.9471.0831.0831.3531.3531.3531.6241.6241.8941.8942.1652.1652.4362.4362.7062.7062.9772.9773.2483.2485/8Hめねじ有効径D2おねじ有効径d20.8380.9381.0381.2051.3731.5731.7401.9082.2082.6753.1103.5454.0134.4805.3506.3507.1888.1889.02610.02610.86312.70114.70116.37618.37620.37622.05125.05127.72730.72733.40236.40239.07742.07744.75248.75252.42856.42860.10364.103内径D1谷の径d10.7290.8290.9291.0751.2211.4211.5671.7132.0132.4592.8503.2423.6884.1344.9175.9176.6477.6478.3769.37610.10611.83513.83515.29417.29419.29420.75223.75226.21129.21131.67034.67037.12940.12942.58746.58750.04654.04657.50561.505外径d1.0001.1001.2001.4001.6001.8002.0002.2002.5003.0003.5004.0004.5005.0006.0007.0008.0009.00010.00011.00012.00014.00016.00018.00020.00022.00024.00027.00030.00033.00036.00039.00042.00045.00048.00052.00056.00060.00064.00068.000メートル並目ねじの規格
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