公制内螺纹(6H)常用规格极限尺寸表(细牙)

公制外螺纹（6g）常用规格极限尺寸表（粗牙） 小径 最大最小最大最小最大最小最大 m3×0.52.9802.8742.6552.5802.4392.602.63 m4×0.73.9783.8383.5233.4333.2203.473.50 m5×0.84.9764.8264.4564.3614.1104.404.43 m6×15.9745.7945.3245.2124.8915.265.29 m8×1.257.9727.7607.1607.0426.6197.107.14 m10×1.59.9689.7328.9948.8628.3448.928.96 m12×1.7511.96611.70110.82910.67910.07210.7510.79 m14×213.9621

公制外螺纹(6g)常用规格极限尺寸表(粗牙) 公称直径×螺 距 螺纹精度等 级 大径中径小径螺胚直径 最大最小最大最小最大最小最大 m3×0.5 6g 2.9802.8742.6552.5802.439 2.602.63 m4×0.7 3.9783.8383.5233.4333.220 3.473.50 m5×0.8 4.9764.8264.4564.3614.110 4.404.43 m6×1 5.9745.7945.3245.2124.891 5.265.29 m8×1.25 7.9727.7607.1607.0426.619 7.107.14 m10×1.5 9.9689.7328.9948.8628.344 8.928.96 m12×

公制细牙内螺纹公制粗牙内螺纹 规格标准径6h精度规格标准径6h精度 dmaxdmindmaxdmin m2.5*0.352.152.1842.121m1.4*0.31.101.161.075 m3.0*0.352.652.6842.621m1.6*0.351.251.3211.221 m3.5*0.353.153.2213.121m1.8*0.351.451.5211.421 m4.0*0.503.503.5993.459m2.0*0.41.601.6791.567 m4.5*0.504.004.0993.959m2.2*0.451.751.8381.713 m5.0*0.504.504.5994.459m2.5*0.452.052.1382.013 m5.5*0.50

常用公制螺纹基本尺寸和极限尺寸表

从到minmaxminmax从到maxminmaxminmaxmin 31.54.532.6752.7752.4592.59931.54.52.9802.8742.6552.5802.3672.256 3.51.753.53.1103.2222.8503.0103.51.753.4793.3543.0893.0042.7432.615 42643.5453.6633.2423.4224263.9783.8383.5233.4333.1192.979 52.57.554.4804..6054.1344.33452.57.54.9764.8264.4564.3613.9953.842 63965.3505.5004.9175.1

1 美制外螺纹（2a）常用规格极限尺寸表（粗牙） 公称尺寸和 每英寸牙数 螺纹 系列 代号 大径极限中径极限 小径max 螺胚直径 最小最大最小最大最小最大 8-32 unc 0.15710.16310.13990.14280.1248 3.583.61 (0.164-32)3.99034.14273.55353.62713.1699 10-240.18180.18900.15860.16190.1379 4.074.10 (0.190-24)4.61774.80064.02844.11233.5027 12-240.20780.21500.18450.18790.1639 4.724.75 (0.216-24)5.2781

maxminmaxminmaxminmaxmin m31.54.56g2.9802.8742.6552.5806h2.7752.6752.5902.495 m4266g3.4783.7493.5233.4336h3.6633.5453.4223.242 m52.57.56g4.9794.7604.4564.3616h4.6054.4804.3344.134 7g4.9764.7404.4564.3067h4.6404.4804.3844.134 m6396g5.9745.7325.3245.2126h5.5005.3505.1534.917 7g5.9745.6945.3245.1447h5.5405.3505.2174.917 m8412

内螺纹无缝钢管部分尺寸规格及螺纹参数 a型锯齿内螺纹无缝钢管部分尺寸规格及螺纹参数 高压内螺纹无缝钢管共有a/b两种齿型，下面我们分别描述下两种齿型的形态、参数。 一a型锯齿内螺纹无缝钢管示意图 横向纵向 a——“a”型齿内螺纹管外径；c——螺纹根部内径；e——最小内径；f——最小壁厚； g——螺纹头数；i——螺纹顶宽（周向）；j——螺纹高度；k——螺纹侧边角度； o——螺纹根部圆角半径；m——螺纹节距；n——螺纹导程；q——螺旋升角； t——螺纹顶宽（轴向）；u——螺纹顶部（轴向）槽宽。图1“a”型齿型 二a型锯齿内螺纹无缝钢管规格参数 钢管 公称外 径 螺纹 根部 内径 最小 内径 公称 壁厚 最小 壁厚 螺纹 头数 螺纹 顶宽 螺纹 高度 螺纹侧 边角度 螺纹根 部圆角 半径 螺纹 节距 螺纹导 程 螺纹 升角 螺纹 顶宽

螺纹 螺距p /mm 小径d1 /mmmax 小径d1 /mmmin 中径d2 /mmmax 中径d2 /mmmin 旋合长度 /mm＞ 旋合长度 /mm≤ m10.250.7850.7290.8940.8380.61.7 m1.20.250.9850.9291.0941.0380.61.7 m1.40.31.1421.0751.2651.2050.72 m1.60.351.3211.2211.4581.3730.82.6 m1.80.351.5211.4211.6581.5730.82.6 m20.41.6791.5671.831.7413 m2.50.452.1382.0132.3032.2081.33.8 m30.52.5992.4592.7752.6751.5

大径中径小径牙高大径中径小径牙高 10.2510.8380.7290.135121.751210.86310.1060.947 1.10.251.10.9380.8290.1351421412.70111.8351.083 1.20.251.21.0380.9290.1351621614.70113.8351.083 1.40.31.41.2051.0750.162182.51816.37615.2941.353 1.60.351.61.3731.2210.189202.52018.37617.2941.353 1.80.351.81.5731.4210.189222.52220.37619.2941.353 20.421.741.567

公制外螺纹（6g）常用规格极限尺寸表（粗牙） 小径 最大最小最大最小最大最小最大 m3×0.52.9802.8742.6552.5802.4392.602.63 m4×0.73.9783.8383.5233.4333.2203.473.50 m5×0.84.9764.8264.4564.3614.1104.404.43 m6×15.9745.7945.3245.2124.8915.265.29 m8×1.257.9727.7607.1607.0426.6197.107.14 m10×1.59.9689.7328.9948.8628.3448.928.96 m12×1.7511.96611.70110.82910.67910.07210.7510.79 m14×213.9621

螺纹公制尺寸表

常用公制螺纹规尺寸标准对照表

尺寸偏差尺寸 偏差 ±tr/2 磨损上限 m1.71.71.4730.30.35-0.019-0.002####0.010.0070.0120.0091.688/1.45570.00501.4677 m221.7400.350.4-0.019-0.002####0.010.0070.0120.0091.988/1.71920.00501.7312 m2.52.52.2080.390.45-0.02-0.002####0.010.0070.0120.0092.487/2.18570.00502.1977 m2.62.62.3080.390.45-0.02-0.002####0.010.0070.0120.0092.587/2.28570.00502.2977 m

螺纹尺寸螺纹尺寸 （英寸）大径中径小径（英寸）psigmpapsigmpa 5/16247.9387.2496.7925/1624456831.5456831.5 7/162011.11310.2879.7387/1620456831.5456831.5 1/22012.711.87511.3251/220456831.5362625 9/161814.28813.32512.5599/1618456831.5362625 3/41619.0518.01917.3313/416456831.5362625 1-1/161226.98825.61324.6951-1/1612362625290020 1-5/161233.33831.96331.0

尺寸 偏差 ±tpl 尺寸 偏差 ±tpl/2 磨损下限尺寸 m1.41.41.2050.260.300.002####0.0070.00950.00751.4020.00701.20720.00351.19771.349 m1.71.71.4730.30.3500.006####0.0090.01250.00951.7060.00901.47870.00451.46621.638 m221.7400.350.400.006####0.0090.01250.00952.0060.00901.74620.00451.73371.921 m2.52.52.2080.390.4500.006####0.0090.01250.00952.5060.00902.21370.0

公制(米制)螺纹极限尺寸

从到minmaxminmax从到maxminmaxminmaxmin 31.54.532.6752.7752.4592.59931.54.52.9802.8742.6552.5802.3672.256 3.51.753.53.1103.2222.8503.0103.51.753.4793.3543.0893.0042.7432.615 42643.5453.6633.2423.4224263.9783.8383.5233.4333.1192.979 52.57.554.4804..6054.1344.33452.57.54.9764.8264.4564.3613.9953.842 63965.3505.5004.9175.1

npt英制螺纹标准与技术数据 螺纹规格螺距外径c1底径螺纹标号螺牙角度备注 npt1/41.41113.6161860 npt3/81.41117.0551860 npt1/21.81421.2231460 npt5/81.81426.5681460 npt12.20833.227111/260 npt11/42.20841.984111/260 npt11/22.20848.053111/260 npt22.20860.091111/260 npt21/23.17572.699860 npt33.17588.608860 npt31/23.175100.013860 pt：美国标准的60度锥管螺纹 美制一般密封管螺纹的基本尺寸： 尺寸 代号 牙数

常用螺纹 螺纹类型外圆刀具尺寸 攻(车)螺纹前外径(工序 卡标注用） 外螺纹6g(2a) 零件图标注用 内螺纹6h(2b) 零件图标注用 内孔刀具尺寸 攻(车)螺纹前内径(工序 卡标注用) m3*0.5φ3(-0.05/-0.1)φ3(-0.02/-0.126)φ2.459(+0.14/0)φ2.5(+0.08/0) m3*0.35φ3(-0.05/-0.1)φ3(-0.019/-0.104)φ2.621(+0.1/0)φ2.6(+0.12/+0.04) m4*0.7φ4(-0.05/-0.15)φ4(-0.022/-0.162)φ3.242(+0.18/0)φ3.3(+0.1/0) m4*0.5φ4(-0.05/-0.1)φ4(-0.02/-0.126)φ3.459(+0.14/0)φ3.5(+0.1/0) m5*0.8

常用螺纹尺寸: 尺寸代号每寸牙数大径中径小径建议底孔基准距离牙数 1/82710.2429.4898.736φ8.64.1024.36 1/41813.61612.48711.358φ11.15.7864.1 3/81817.05515.92614.797φ14.56.0964.32 1/21421.22319.77218.321φ17.98.1284.48 3/41426.56825.11723.666φ23.28.6114.75 111.533.22831.46129.694φ29.210.1604.6 1-1/411.541.98540.21838.451φ37.910.6684.83 1-1/211.548.05446.28744.520φ43.910.66

公称通径 nps 1/4″81912.711.29.7141/4″1813.2-0.211.4+0.210.2141/41913.15 3/8101916.114.510.1153/81816.6-0.214.8+0.210.4153/81916.66 1/2151420.318.813.2181/21420.7-0.218.5+0.213.6181/21420.95 3/4201425.724.214.5193/41426-0.323.7+0.213.7193/41426.44 1251132.430.416.824111.532.6-0.329.7+0.217.42311133.25 1-1/43211413919.125