螺紋基本尺寸對照表

..螺紋基本尺寸對照表〔以及螺紋底孔相關(guān)尺寸參照機(jī)械設(shè)計師首冊編制OPMSM20XX7月螺紋代號Threadcode一、英制螺紋〔螺紋牙型角55度BSW——英國標(biāo)準(zhǔn)惠氏螺紋〔粗牙BSF——英國標(biāo)準(zhǔn)惠氏螺紋〔細(xì)牙G——直管螺紋<外螺紋分A、B兩級即在螺紋中徑公差有所區(qū)別,絲錐分G、G-D>非密封性螺紋R——錐管外螺紋〔舊代號ZG；KGRC——錐管內(nèi)螺紋〔舊代號ZG；KG二、美制螺紋〔螺紋牙型角60度UNC——統(tǒng)一制粗牙螺紋〔代替NCUNF——統(tǒng)一制細(xì)牙螺紋〔代替NFUNEF——統(tǒng)一制超細(xì)牙螺紋UN——統(tǒng)一制不變螺距螺紋UNS——統(tǒng)一制特殊螺紋三、美制螺紋〔螺紋牙型角60度NPT——一般用途錐管螺紋〔舊代號Z、K〔斜角為1°47'即1：16NPSC——管接頭直管內(nèi)螺紋NPSM——設(shè)備上自由配合,機(jī)械連接用直管螺紋NPTF——干密封錐管螺紋NPSF——干密封燃料內(nèi)螺紋NGT——?dú)馄坑寐菁y四、米制螺紋〔螺紋牙型角60度,斜角為1°47'24"即1：16ZM——米制錐管螺紋五、其它螺紋SM——縫紉機(jī)螺紋〔螺紋牙型角60度,平頂、螺紋底部為園弧形PZ——?dú)馄柯菁y5V1至20V1——?dú)忾T芯螺紋〔螺紋牙型角60度,平頂、螺紋底部為園弧形六、管螺紋〔螺紋牙型角55度,螺紋頂、底部為園弧形約RC——圓錐內(nèi)螺紋〔螺紋牙型角55度,斜角為1°47'即1：16RP——圓柱內(nèi)螺紋〔螺紋牙型角55度R——圓錐外螺紋〔螺紋牙型角55度,斜角為1°47'即1：16七、普通螺紋〔螺紋牙型角60度M——普通螺紋代號八、特殊螺紋Tr——梯形螺紋〔螺紋牙型角30度B——鋸齒形螺紋〔牙型角30×30度螺紋公稱直徑d螺距P鉆頭直徑d銅不銹鋼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非螺紋密封英制英制錐管螺紋英制錐螺紋螺紋直徑牙數(shù)鉆頭直徑螺紋直徑牙數(shù)鉆頭直徑螺紋直徑牙數(shù)鉆頭直徑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>螺紋長度基面上螺紋直徑牙型高度<h1>有效長度基面長度外徑<d>中徑<d2>內(nèi)徑<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本螺紋基面上各直徑等于圓柱螺紋的各相應(yīng)直徑基面上螺紋內(nèi)徑d1=d-1.28t3/4″=26.44-1.28*1.81=24.12斜角〔φ1°47'24″錐角〔2tgφ>=1:16公稱直徑〔英寸每英寸牙數(shù)〔n>螺距<t>管子外徑〔d>管接頭螺紋內(nèi)徑〔d1'>牙型高度<h1>名義尺寸最大外徑最小外徑名義尺寸最大內(nèi)徑最小內(nèi)徑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外徑d由公稱直徑所決定螺紋內(nèi)徑d1=d-1.28t斜角〔φ1°47'24″錐角〔2tgφ>=1:16公稱直徑〔英寸每英寸牙數(shù)〔n>螺距<t>螺紋長度基面上螺紋直徑牙型高度<h1>有效長度基面長度外徑<d>中徑<d2>內(nèi)徑<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外徑d由公稱直徑所決定牙型高度h1=0.8t基面上螺紋內(nèi)徑d1=d-1.6t3/8″=17.06mmd1=17.06-1.6*1.41=14.80斜角〔φ1°47'24″錐角〔2tgφ>=1:16公稱直徑每寸牙數(shù)螺距<t>外螺紋外徑內(nèi)螺紋內(nèi)徑選用鉆頭名義尺寸最大尺寸最小尺寸名義尺寸最大尺寸最小尺寸3/16″241.064.634.54.243.563.973.71Φ3.71/4″201.276.26.055.754.915.395.1Φ5.15/16″181.417.787.627.316.346.866.55Φ6.53/8″161.599.369.28.97.738.297.97Φ7.97/16″141.8110.9310.7510.459.069.679.33Φ9.31/2″122.1212.512.311.910.310.9610.61Φ10.59/16″122.1214.0813.8713.4711.8912.5612.2Φ12.15/8″112.3115.6515.4315.0313.2613.9413.6Φ13.53/4″102.5418.8118.5718.1716.1716.9216.54Φ16.47/8″92.8221.9621.721.219.0319.8219.45Φ19.51″83.1825.1124.8224.3221.822.6722.27Φ221-1/8″73.6328.2527.9327.3324.4625.4324.991-1/4″73.6331.4331.0930.4927.6428.5928.181-3/8″64.2334.5634.233.630.1331.2330.761-1/2″64.2337.7337.3636.7633.3134.3833.941-3/4″55.0844.0243.5942.7938.739.9539.451-7/8″4.55.6447.1546.6845.8841.2342.5842.062″4.55.6450.3249.8449.0444.4145.7945.25內(nèi)螺紋〔d＇公稱直徑3/4″=19.05mm外螺紋〔d1內(nèi)徑d＇-1.28t3/4″=19.05-1.28*2.54=15.79mm外螺紋〔d1＇內(nèi)徑d＇-1.134t3/4″=19.05-1.134*2.54=16.16mm公稱直徑〔英寸每英寸牙數(shù)〔n>螺距<t>外螺紋外徑內(nèi)螺紋內(nèi)徑名義尺寸名義尺寸11/16141.81417.2815.43/8201.279.388.087/8112