特征直径代号2分管：10毫米；4分管：12毫米；6分管：16毫米；8分管：20毫米；1寸G管：25毫米；1.2寸管：32毫米；1.5寸管：40毫米；2寸管：50毫米；2.5寸分管：65毫米；3寸管：80毫米；4寸管：100毫米；5寸管：125毫米；6寸管：管150毫米；8寸管：200毫米；10寸管：250毫米；12寸管：300毫米；平口管：15毫米；4分水管：20毫米；6分水管：25毫米；1寸水管：32毫D米；1.5寸水管：40毫米；2.5寸水管：50毫米；4寸水管：75毫米；6寸水管：管100毫米；8寸水管：150毫米；d平键和键槽的配合尺寸，直径为键宽的60~75%，螺距，相邻两牙在中径线上对应两点之间的轴向距离，一般指螺纹螺距，P在中径线上，相邻两牙在中径线上对应两点之间的轴向距离，称为螺距。n罗纹头数1.M68*1.25-6g-S 6 2.G3/4 90度5#-K35 英制螺纹小径，外螺纹牙底径，内螺纹牙底径，公称直径下限，同公称直径，牙底d1直径，内螺纹大径上限，小径为内螺纹大径下限。大径，外螺纹大径上限，内螺纹大径下限，公称直径，同公称直径，牙顶d2直径，内螺纹小径

英制螺纹（螺纹牙型角55 度）BSW英国标准惠氏螺纹（粗牙）BSF英国标准惠氏螺纹（细牙）G直管螺纹(外螺纹分A、B 两级即在螺纹中径公差有所区别，丝锥分G、G-D)非密封性螺纹R锥管外螺纹（旧代号ZG；KG）RC锥管内螺纹（旧代号ZG；KG） 美制螺纹（螺纹牙型角60 度）UNC统一制粗牙螺纹（代替NC）UNF统一制细牙螺纹（代替NF）UNEF统一制超细牙螺纹UN统一制不变螺距螺纹UNS统一制特殊螺纹 美制螺纹（螺纹牙型角60 度）NPT一般用途锥管螺纹（旧代号Z、K）（斜角为1°47'即1：16）NPSC管接头直管内螺纹NPSM设备上自由配合，机械连接用直管螺纹NPTF干密封锥管螺纹NPSF干密封燃料内螺纹NGT气瓶用螺纹 米制螺纹（螺纹牙型角60 度，斜角为1°47'24"即1：16）ZM米制锥管螺纹 其它螺纹SM缝纫机螺纹（螺纹牙型角60 度，平顶、螺纹底部为园弧形）PZ气瓶螺纹5V1 至20V1气门芯螺纹（螺纹牙型角60 度，平顶、螺纹底部为园弧形） 管螺纹（螺纹牙型角55 度，螺纹顶、底部为园弧形约）RC圆锥内螺纹（螺纹牙型角55 度，斜角为1°47'即1：16）RP圆柱内螺纹（螺纹牙型角55 度）R圆锥外螺纹（螺纹牙型角55 度，斜角为1°47'即1：16） 普通螺纹（螺纹牙型角60 度）M普通螺纹代号 特殊螺纹Tr梯形螺纹（螺纹牙型角30 度）B锯齿形螺纹（牙型角30×30 度）文案大全实用文档螺纹公称直径d螺距P钻头直径d铜不锈钢20．41．61．60．251．751．7530．52．52．50．352．152．1540．73．33．30．53．53．550．84．14．20．54．54．5614．950．755．25．281．256．66．71770．757．17．2101．58．48．51．258．68．716．970．757．17．2121．7510．110．21．510．410．51．2510．610．7110．91114211．8121．512．412．5112．91316213

螺纹底孔径公制粗牙螺纹JIS B 0209-1982(单位：mm)崁合度区分：中(注1)2级(注2)内螺纹小径螺纹尺寸钻头直径崁合度区分：中(注1)2级(注2)下孔径最小直径最大直径M1×0.25 0.75 0.78(80%)0.729 0.785 1.1 ×0.25 0.85 0.88(80%)0.829 0.885 1.2 ×0.25 0.95 0.98(80%)0.929 0.985 1.4 ×0.3 1.1 1.14(80%)1.075 1.142 1.6 ×0.35 1.25 1.32(75%)1.221 1.321 1.8 ×0.35 1.45 1.52(75%)1.421 1.521 2×0.4 1.6 1.65(80%)1.567 1.679 2.2 ×0.45 1.75 1.83(75%)1.713 1.838 2.5 ×0.45 2.1 2.13(75%)2.013 2.138 3×0.5 2.5 2.59(75%)2.459 2.599 3.5 ×0.6 2.9 3.01(75%)2.850 3.010 4×0.7 3.3 3.39(80%)3.242 3.422 4.5 ×0.75 3.8 3.85(80%)3.688 3.878 5×0.8 4.2 4.31(80%)4.134 4.334 6×1 5 5.13(80%)4.917 5.153 7×1 6 6.13(80%)5.917 6.153 8×1.25 6.8 6.85(85%)6.647 6.912 9×1.25 7.8 7.85(85%)7.647 7.912 10×1.5 8.5 8.62(85%)8.376 8.676 11×1.5 9.5 9.62(85%)9.376 9.676 12×1.75 10.3 10.40(85%)10.106 10.441 14×2 12 12.2(85%)11.835 12.210 16×2 14 14.2(85%)13.835 14.210 18×2.5 15.5 15.7(85%)15.294 15.744 20×2.5 17.5 17.7(85%)17.294 17.744 22×2.5 19.5 19.2(85%)19.294 19.744 24×3 21 21.2(85%)20.752 21.252 27×3 24 24.2(85%)23.752 24.252 30×3.5 26.5 26.6(90%)26.211 26.771 33×3

螺纹基本尺寸表管螺纹基本尺寸表(GB/T7307-1987)公称直径(英寸)每英寸牙数n螺纹直径螺距t牙形高度h1圆弧半径<外径d中径d2内径d1(1/8)280.9079.7299.1488.5670.5811/40.1251913.15812.30211.4461.3370.8563/80.1841916.66315.80714.9510.8561/20.1841420.95619.79418.632(5/8)1400.91221.75020.5881.8143/41426.4421.16225.2810.24924.119(7/8)1430.20229.04027.87811133.25031.77130.2931.1/81137.89836.42034.9411.1/41141.91240.43338.9541.3/81144.32542.84641.3671.1/21147.80546.32644.8471.3/41153.74852.27050.79121159.61658.13756.6592.1/4112.30965.71264.23462.7551.4792.1/20.3171175.18773.70872.2302.3/41181.53780.05878.58031187.88786.40984.9803.1/211100.33498.85597.376411113.034111.556110.077511138.435136.957135.478611163.836162.357160.879

公称尺寸d螺纹规格6g)中径尺寸d2通规TH止规ZP大径ZRTd2esTR中径TPLWcoWNG大径>d+es+Tpup中径-2日a+es->d+es+Tpud2+es-Td 2-TR/2C2+尺寸偏差M1.7偏差1.7尺寸1.4730.3磨损上限0.350.0190.002尺寸偏差0.063偏差月120.01t1B/2尺寸0.0070.0120.01M21.688磨损上限2/1.7401.45570.350.005012±1R/20.40.0191.46770.0020.0671.6880.010.007/0.0121.3857M2.50.010.00501.9882.5/2.2081.3950.391.71920.450.00500.021.73120.0020.0711.9880.010.007/0.0121.79320.01M2.62.4872.60.0050/2.3081.8022.18570.390.00500.45-0.022.19770.0020.0712.4870.010.007/0.0122.26370.01M32.5870.00503/2.6752.2732.28570.430.00500.50.0202.29770.0020.0752.5870.01/0.0072.36370.0120.012.987M40.00504/2.3733.5452.65330.610.70.00500.0220.0022.66530.0902.9870.014/0.0090.0162.73530.013.987M4*0.50.00504/3.52543.6752.7440.430.00700.50.0203.54140.0020.0753.9870.01/0.0070.0123.62040.01M50.00703.9875/4.4803.6323.65330.690.00500.80.0243.66530.0020.0953.9870.014/0.0093.73530.016M5*0.50.010.00504.9855/4.6753.7444.45840.430.50.00700.0204.47440.0020.0754.9850.01/0.0070.0124.55840.014.987M660.0070/5.3514.65334.5700.870.005010.0264.66530.0020.1120.0144.9870.009/0.0164.7353M6*0.750.010.00505.9836/5.5134.7445.32650.650.00700.7

普通螺纹基本尺寸(mm)公称直螺距p中径小径公称直螺距p中径小径径径10.250.8380.729221.521.02620.3761.20.251.0380.929222.520.37619.2941.40.31.2051.07524222.70121.8351.60.351.3731.22124322.05120.75220.41.7401.56727225.70124.8352.50.452.2082.01327325.05123.75230.52.6752.45930228.70127.8353.50.63.1102.850303.527.72726.21140.73.5453.24233231.70130.8354.50.754.0133.688333.530.72729.21150.84.4804.13436334.05132.752615.3504.91736433.04231.670817.3506.91739337.05135.75281.257.1886.64739436.04234.6701019.3508.91742340.05138.752101.259.1888.647424.539.07737.129101.59.0268.37645343.05141.752121.2511.18810.647454.542.07740.129121.511.02610.37648346.05144.752121.7510.86310.10648544.75242.587141.513.02612.37652449.40247.67014212.70111.83552548.75246.587161.515.02614.37658454.40252.67016214.70113.83558554.75252.587182.516.37615.29460457.40255.670201.519.02618.376605.556.42854.04620218.70117.83564461.40259.670202.518.37617.29464660.10357.505

基本直径内螺纹外螺纹A级B级螺纹代号大径中径小径中径公差小径公差中径公差大径公差中径公差大径公差G1/8"×289.7289.1478.566+0.170+0.28200-0.1070-0.2140-0.2140-0.214G1/4"×1913.15712.30111.445+0.125+0.445-0.125-0.250-0.2500-0.250G3/8"×1916.66215.80614.950+0.1250+0.44500-0.1250-0.2500-0.2500-0.250G1/2"×1420.95519.79318.631+0.1420+0.54100-0.1420-0.2840-0.2840-0.284G5/8" ×1422.91121.74920.587+0.1420+0.54100-0.1420-0.2840-0.2840-0.2840000G3/4"×1426.44125.27924.117+0.1420+0.54100.142-0.2840.2840.2840G1"×1133.24931.77030.291+0.1800+0.64000-0.3600-0.3600-0.360-0.1800G1.1/4"×1141.91040.43138.952+0.1800+0.64000-0.3600-0.3600-0.360-0.180G1.1/2"×1147.80346.32444.854+0.1800+0.64000-0.1800-0.3600-0.3600-0.3600G2”×1159.61458.13556.656+0.1800+0.64000-0.3600-0.3600-0.360-0.1800-0.434G2.1/2"X1175.18473.70572.226+0.2170+0.64000-0.2170-0.4340-0.4340G3"X1187.88486.40584.926+0.2170+0.64000-0.4340-0.4340-0.434-0.21700-0.2170-0.4340-0.434G3.1/2"X11100.33098.85197.372+0.2170+0.6400-0.434