标准公制螺纹基本牙型和公式

公制螺纹粗牙公制螺纹细牙公称尺寸M螺距P外径D=d节径D2=d2内径D1=d1公称尺寸M螺距P外径D=d节径D2=d2内径D1=d1M10.251.0000.8380.729M1.20.251.2001.0380.929M1.40.31.4001.2051.075M20.42.0001.7401.567M30.53.0002.6752.459M30.353.0002.7732.621M3.50.63.5003.1102.850M3.50.353.5003.2733.121M40.704.0003.5453.242M40.54.0003.6753.459M4.50.754.5004.0133.688M4.50.54.5004.1753.959M50.85.0004.4804.134M50.55.0004.6754.459M616.0005.3504.917M60.756.0005.5135.188M81.258.0007.1886.647M818.0007.3506.917M101.510.0009.0268.376M101.2510.0009.1888.647M121.7512.00010.86310.106M121.512.00011.02610.376M14214.00012.70111.835M141.514.00013.02612.376M16216.00014.70113.835M161.516.00015.02614.376M182.518.00016.37615.294(M18)1.518.00017.02616.376M202.520.00018.37617.294M201.520.00019.02618.376M222.522.00020.37619.294(M22)222.00020.70119.835M24324.00022.05120.752M24224.00022.70121.835M27327.00025.05123.752M27226.00025.70124.835M303.530.00027.72726.211M28228.00026.70125.835M333.533.00030.72729.211M30330.00028.05126.752M36436.00034.40231.670M33332.00031.05129.752

M39439.00036.40234.670M36336.00034.05132.752M424.542.00039.07737.129M39338.00037.05135.752M454.545.00042.07740.129M40340.00038.05136.752M20×L5LH-5g6g-S'*短旋合长度3.螺纹标记含义例1：M20×L5LH含义：公称直径为20,螺距为1・5的左旋单线细牙普通螺纹。公差代号用大写字母的螺纹为内螺纹;反之，用小写字母的则为外螺纹。Tr迪強次ZR且刁苜迪坯次说岀下列螺纹的标记螺纹公称直径d螺距P钻头直径d铜不锈钢20．41．61．60．251．751．7530．52．52．50．352．152．1540．73．33．30．53．53．550．84．14．20．54．54．5614．950．755．25．281．256．66．71770．757．17．2101．58．48．51．258．68．716．970．757．17．2121．7510．110．21．510．410．51．2510．610．7110．91114211．8121．512．412．5112．91316213．8141．514．414．5114．915182．515．315．5215．8161．516．416．5116．917202．517．317．5217．8181．518．418．5118．919222．519．319．5219．8201．520．420．5120．92124320．721221．8221．522．422．5122．923非螺纹密封英制英制锥管螺纹英制锥螺纹螺纹直径牙数钻头直径螺纹直径牙数钻头直径螺纹直径牙数钻头直径1/8288．81/8288．41/8278．61/41911．71/41911．21/41811．13/81915．23/81914．73/81814．51/21418．91/21418．31/21417．93/41424．43/41423．63/41423．211130．611429．7111．529．21-1/41139．21-1/41138．31-1/411．537．91-3/81141．61-1/21144．11-1/211．543．91-1/21145．121155．8211．556螺距(t)螺纹长度基面上螺纹直径牙

型高度(h1)有效长度基面长度外径(d)中径(d2)内径(d1)0.9194.59.739.158.570.581.3411613.1612.311.450.861.3412616.6615.8114.950.861.81157.520.9619.7918.631.161.81179.526.4425.2824.121.162.31191133.2531.7730.291.482.31221341.9140.4338.951.482.31231447.8146.3344.851.482.31261659.6258.1456.661.482.313018.575.1973.7172.231.482.313220.587.8986.4184.931.482.313825.5113.03111.56110.081.48本螺纹基面上各直径等于圆柱螺纹的各相应直径基面上螺纹内径d1=d-1.28t3/4″=26.44-1.28*1.81=24.12斜角（φ）1°47'24″锥角（2tgφ）=1:16公称直径（英寸）每英寸牙数（n）螺距（t）管子外径（d）管接头螺纹内径（d1'）牙型高度（h1）名义尺寸最大外径最小外径名义尺寸最大内径最小内径1/8280.919.739.689.388.578.928.670.581/4191.3413.1613.112.7411.4511.8411.560.863/8191.3416.6616.616.2414.9515.3515.060.861/2141.8120.9620.8920.518.6319.0518.751.165/8141.8122.9122.8522.4620.5921.0120.711.163/4141.8126.4426.3825.9724.1224.5724.251.167/8141.8130.230.1429.7327.8828.3328.011.161112.3133.2533.1832.7530.2930.7930.431.481-1/4112.3141.9141.8441.3638.9539.4639.11.481-3/8112.3144.3344.2643.7841.3741.8741.511.481-1/2112.3147.8147.7447.2144.8545.4451.481-3/4112.3153

.7553.6753.1450.7951.3450.941.482112.3159.6259.5459.0156.6657.2156.811.482-1/2112.3175.1975.1174.5472.2372.8372.391.483112.3187.8987.887.1984.9385.5885.11.48外径d由公称直径所决定螺纹内径d1=d-1.28t斜角（φ）1°47'24″锥角（2tgφ）=1:16公称直径(英寸)每英寸牙数(n)螺距(t)螺纹长度基面上螺纹直径牙型高度(h1)有效长度基面长度外径(d)中径(d2)内径(d1)1/16270.946.54.067.97.146.390.751/8270.9474.5710.279.528.770.751/4181.419.55.0813.5712.4411.311.133/8181.4110.56.117.0615.9314.81.131/2141.8113.58.1321.2219.7718.321.453/4141.81148.6126.5725.1223.671.45111-1/22.2117.510.1633.2331.4629.691.771-1/411-1/22.211810.6741.9940.2238.451.771-1/211-1/22.2118.510.6748.0546.2944.521.77211-1/22.211911.0760.0958.3356.561.77外径d由公称直径所决定牙型高度h1=0.8t基面上螺纹内径d1=d-1.6t3/8″=17.06mmd1=17.06-1.6*1.41=14.80斜角（φ）1°47'24″锥角（2tgφ）=1:16直径每寸牙数螺距(t)外螺纹外径内螺纹内径选用名义尺寸最大尺寸最小尺寸名义尺寸最大尺寸最小尺寸6″241.064.634.54.243.563.973.71Φ201.276.26.055.754.915.395.1Φ6″181.417.787.627.316.346.866.55Φ161.599.369.28.97.738.297.97Φ6″141.8110.9310.7510.459.069.679.33Φ122.1212.512.311.910.310.9610.61Φ16″122.1214.0813.8713.471

1.8912.5612.2Φ1112.3115.6515.4315.0313.2613.9413.6Φ1102.5418.8118.5718.1716.1716.9216.54Φ192.8221.9621.721.219.0319.8219.45Φ183.1825.1124.8224.3221.822.6722.27Φ8″73.6328.2527.9327.3324.4625.4324.994″73.6331.4331.0930.4927.6428.5928.188″64.2334.5634.233.630.1331.2330.762″64.2337.7337.3636.7633.3134.3833.944″55.0844.0243.5942.7938.739.9539.458″4.55.6447.1546.6845.8841.2342.5842.064.55.6450.3249.8449.0444.4145.7945.25内螺纹（d＇）公称直径3/4″=19.05mm外螺纹（d1）内径d＇-1.28t3/4″=19.05-1.28*2.54=15.79mm外螺纹（d1＇）内径d＇-1.134t3/4″=19.05-1.134*2.54=16.16mm公称直径（英寸）每英寸牙数（n）螺距(t)外螺纹外径内螺纹内径名义尺寸名义尺寸d=d'-0.075t-0.0511/16141.81417.2815.43/8201.279.388.087/8112.312219.65/8141.8115.6913.823/4122.1218.8416.651/4260.9766.235.241/2161.58712.5310.91102.5425.1522.52内螺纹d'（公称直径）外螺纹d1=内径=d'-1.28t3/4″=19.05-1.28*2.116=16.34内螺纹d1=内径=d'-1.134t3/4″=19.05-1.134*2.116=16.653/4″=12牙/英寸t=2.116 标准 excel标准偏差excel标准偏差函数exl标准差函数国标检验抽样标准表免费下载红头文件格式标准下载 统一标准螺纹基本牙型和公式公称尺寸外径D=d节径D2=d2内径D1=d1公称尺寸外径D=d节径D2=d2内径D1=d1粗牙UNC细牙UNF粗牙UNC细牙UNF#0-801.5241.3181.1817/16-14---11.1129.9349.149#1-64---1.8541.598

1.4257/16-2011.11210.2879.738#1-721.8541.6261.4732/1-13---12.70011.43010.584#2-56---2.1841.8901.6942/1-2012.70011.87411.326#2-642.1841.9281.7559/16-12---14.28812.91311.996#3-48---2.5152.1721.9419/16-1814.28813.37112.761#3-562.5152.2202.0245/8-11---15.87514.37613.376#4-40---2.8452.4332.1565/8-1815.87514.95814.348#4-482.8452.5022.2713/4-10---19.05017.39916.299#5-40---3.1752.7642.4873/4-1619.05018.01917.330#5-443.1752.7092.5517/8-9---22.22520.39119.169#6-32---3.5052.9902.6477/8-1422.22521.04620.262#6-403.5053.0942.817#8-32---4.1663.6503.3071-8---25.40023.33821.963#8-364.1663.7083.4011-1225.40024.02623.109#10-24---4.8264.1383.68011/8-7---28.57526.21824.648#10324.8264.3103.96711/8-1228.57527.20126.284#12-24---5.4864.7984.34111/4-7---31.75029.39327.823#12285.4864.8974.50311/4-1231.75030.37629.4591/4-20---6.3505.5244.97613/8-6---34.92532.17430.3431/4-286.3505.7615.36713/8-1234.92533.55132.6345/16-18---7.9387.0216.41111/2-638.10035.34933.51815/16-247.9387.2496.79211/2-1238.10036.72635.809