螺紋基本尺寸對照表97187

1、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OPMSM2005 年 7 月螺紋代號Thread code、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; KG）RC錐管內(nèi)螺紋（舊代號 ZG ； KG）、美制螺紋（螺紋牙型角 60 度）UNC 統(tǒng)一制粗牙螺紋（代替NC)UNF統(tǒng)一制細(xì)牙螺紋（代替NF)UNEF 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

2、般用途錐管螺紋（舊代號 Z、K）（斜角為1 47即1: 16） NPSC 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 氣瓶用螺紋四、米制螺紋（螺紋牙型角 60 度，斜角為 1 4724 即 1 : 16）ZM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 氣瓶螺紋5V1 至 20V1 氣門芯螺紋（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: 16）RP圓柱內(nèi)螺紋

3、（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 X30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 . 7

4、1770 . 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 . 5

5、18 . 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/

6、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)0.9194.59.739.158.570.581.3411613.1612.311.450.861.3412616.6615.8114.950.86

7、1.81157.520.9619.7918.631.161.81179.526.4425.2824.121.162.31191133.2531.7730.291.482.31221341.9140.4338.951.482.31231447.8146.3344.851.482.31261659.6258.1456.661.482.313018.575.1973.7172.231.482.313220.587.8986.4184.931.482.313825.5113.03111.56110.081.48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 =

8、 26.44 - 1.28 * 1.81 = 24.12斜角（0） 1 724 ”錐角 （2tg 小=1:16公稱每英螺管子外徑（d）管接頭螺紋內(nèi)徑（d1)牙型直徑寸牙距名義最大外徑最小外徑名義最大內(nèi)徑最小內(nèi)徑高度（英數(shù)尺寸尺寸(h1)寸）(n)1/8280.99.739.689.388.578.928.670.5811/4191.313.113.112.7411.411.8411.560.864653/8191.316.616.616.2414.915.3515.060.864651/2141.820.920.8920.518.619.0518.751.161635/8141.822.922

9、.8522.4620.521.0120.711.161193/4141.8126.4426.3825.9724.1224.5724.251.167/8141.830.230.1429.7327.828.3328.011.16181112.333.233.1832.7530.230.7930.431.481591-1/4112.341.941.8441.3638.939.4639.11.481151-3/8112.344.344.2643.7841.341.8741.511.481371-1/2112.347.847.7447.2144.845.4451.481151-3/4112.353.75

10、3.6753.1450.751.3450.941.481592112.359.659.5459.0156.657.2156.811.481262-1/2112.375.175.1174.5472.272.8372.391.481933112.387.887.887.1984.985.5885.11.48193外徑d由公稱直徑所決定螺紋內(nèi)徑d1 = d - 1.28t斜角(0) 1 724 ” 錐角 (2tg 小=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)1/16270.96.54.067.97.

11、146.390.7541/8270.974.5710.279.528.770.7541/4181.49.55.0813.5712.4411.311.1313/8181.410.56.117.0615.9314.81.1311/2141.813.58.1321.2219.7718.321.4513/4141.8148.6126.5725.1223.671.451111-1/22.217.510.1633.2331.4629.691.7711-1/411-1/22.21810.6741.9940.2238.451.7711-1/211-1/22.218.510.6748.0546.2944.521

12、.771211-1/22.21911.0760.0958.3356.561.771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（0） 1 724 ” 錐角 （2tg 小=1:16公稱直徑每寸牙數(shù)螺距外螺紋外徑內(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3/16 241.064.634.54.243.563.973.713.71/4 201.276.26.055.754.915.395.15.15/16 ”181.417.787.627.316.

13、346.866.556.53/8 161.599.369.28.97.738.297.977.97/16 ”141.8110.9310.7510.459.069.679.339.31/2 ”122.1212.512.311.910.310.9610.61 10.59/16 122.1214.0813.8713.4711.8912.5612.2 12.15/8 112.3115.6515.4315.0313.2613.9413.6 13.53/4 102.5418.8118.5718.1716.1716.9216.54 16.47/8 92.8221.9621.721.219.0319.8219

14、.45 19.51 83.1825.1124.8224.3221.822.6722.27221-1/8 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 4.55.6447.1546.6845.8841.2342.5842.0624.55.6450.3249.8449.0444.4145.7945.25內(nèi)螺紋（d/）公稱直徑3/4 =19.05 mm外螺紋（di ） 內(nèi)徑 d / -1.28 t 3/4 =19.05 -1.28 * 2.54=15.79 mm外螺紋（d1 勺 內(nèi)徑 d / -1.134 t 3/4 =19.05 -1.134 * 2.54=16.16 mm公稱直徑每英寸牙數(shù)螺距外螺紋外徑內(nèi)螺紋內(nèi)徑（英寸）(n)名義尺寸名義尺寸11/16141.81417.2815.43/8201.279.388.087/8112.312