1、切削速度與切削液加工材料切削速度（m/min ）切削液直槽絲攻螺旋絲攻先端絲攻鎢鋼絲攻無(wú)屑絲攻高速同步絲攻管用絲攻油性水溶性（乳化液）半乾式乾式C0.25 以下8138131525813273236中碳素鋼C0.25 0.457127121015710273236高碳素鋼C0.45 以上696981358222725合金鋼SCM712712101558222725調(diào)質(zhì)鋼25 45HRC35 (48)35 (48)46 (610)25不銹鋼SUS475881351036不銹鋼SUS630SUS63135354625工具鋼SKD696971025鑄鋼SC6116111015172225鑄鐵FC10

2、15102025球鑄鐵FCD7127121020102048銅Cu696117121020712273225黃銅 黃銅鑄件?Bs?BsC10151020152515257122732510青銅? 青銅鑄件PB?PBC61161110201020712611變形 鋁合金AL1020102010251020 100300510鋁合金 鑄件AC?ADC10151015152010201015803001015鎂合金MC712712101510201015鋅鑄件ZDC71271210151020712271001015熱硬塑料Thermo Setting Plastic10201525510熱可塑性

3、塑料Thermo Plastic10201015102010202732510 適用 可使用不可使用螺紋下孔徑表公制粗牙螺紋JIS B 0209-1982（ 單位： mm）崁合度區(qū)分：中（註 1）2級(jí)內(nèi)螺紋小徑(註 2)螺紋尺寸鑽頭直徑崁合度區(qū)分：中（注 1）2級(jí)（注 2）下孔徑最小直徑最大直徑M1 0.250.750.78(80%)0.7290.7851.10.250.850.88(80%)0.8290.8851.20.250.950.98(80%)0.9290.9851.40.31.11.14(80%)1.0751.1421.60.351.251.32(75%)1.2211.3211.80

4、.351.451.52(75%)1.4211.5212 0.41.61.65(80%)1.5671.6792.20.451.751.83(75%)1.7131.8382.50.452.12.13(75%)2.0132.1383 0.52.52.59(75%)2.4592.5993.50.62.93.01(75%)2.8503.0104 0.73.33.39(80%)3.2423.4224.50.753.83.85(80%)3.6883.8785 0.84.24.31(80%)4.1344.3346 155.13(80%)4.9175.1537 166.13(80%)5.9176.1538 1.

5、256.86.85(85%)6.6476.9129 1.257.87.85(85%)7.6477.91210 1.58.58.62(85%)8.3768.67611 1.59.59.62(85%)9.3769.67612 1.7510.310.40(85%)10.10610.44114 21212.2(85%)11.83512.21016 21414.2(85%)13.83514.21018 2.515.515.7(85%)15.29415.74420 2.517.517.7(85%)17.29417.74422 2.519.519.2(85%)19.29419.74424 32121.2(8

6、5%)20.75221.25227 32424.2(85%)23.75224.25230 3.526.526.6(90%)26.21126.77133 3.529.529.6(90%)29.21129.77136 43232.1(90%)31.67032.27039 43535.1(90%)34.67035.27042 4.537.537.6(90%)37.12937.79945 4.540.540.6(90%)40.12940.79948 54343.1(90%)42.58743.297註 （1）M1.4 以下等級(jí)：5H、 M1.6 以上等級(jí)：6H（2）基於JIS B 0209-1982 標(biāo)

7、準(zhǔn)螺紋下孔徑表公制細(xì)牙螺紋JIS B 0211-1982（ 單位： mm）螺紋尺寸鑽頭直徑崁合度區(qū)分：中（注 1）2級(jí)（注 2）下孔徑崁合度區(qū)分：中（註 1）2級(jí)（註 2）內(nèi)螺紋小徑最小直徑最大直徑M 2.5 0.352.22.22 (75%)2.1212.2213 0.352.72.72 (75%)2.6212.7213.5 0.353.23.22 (75%)3.1213.2214 0.53.53.59 (75%)3.4593.5994.5 0.544.09(75%)3.9594.0995 0.54.54.59(75%)4.4594.5995.5 0.555.09(75%)4.9595.09

8、96 0.755.35.35(80%)5.1885.3787 0.756.36.35(80%)6.1886.3788 177.13(80%)6.9177.1538 0.757.37.35(80%)7.1887.3789 188.13(80%)7.9178.1539 0.758.38.35(80%)8.1888.37810 1.258.88.85(85%)8.6478.91210 199.13(80%)8.9179.15310 0.759.39.35(80%)9.1889.37811 11010.13(80%)9.91710.15311 0.7510.310.35(80%)10.18810.37

9、812 1.510.510.62(85%)10.37610.67612 1.2510.810.85(85%)10.64710.91212 11111.13(80%)10.91711.15314 1.512.512.62(85%)12.37612.67614 11313.13(80%)12.91713.15315 1.513.513.62(85%)13.37613.67615 11414.13(80%)13.91714.15316 1.514.514.62(85%)14.37614.67616 11515.13(80%)14.91715.15317 1.515.515.62(85%)15.376

10、15.67617 11616.13(80%)15.91716.15318 21616.2(85%)15.83516.21018 1.516.516.62(85%)16.37616.67618 11717.13(80%)16.91717.15320 21818.2(85%)17.83518.21020 1.518.518.62(85%)18.37618.67620 11919.13(80%)18.91719.15322 22020.2(85%)19.83520.21022 1.520.520.62(85%)20.37620.67622 12121.13(80%)20.91721.15324 22

11、222.2(85%)21.83522.21024 1.522.522.62(85%)22.37622.67624 12323.13(80%)22.91723.15325 22323.2(85%)22.83523.21025 1.523.523.62(85%)23.37623.67625 12424.13(80%)23.91724.153螺紋下孔徑表公制細(xì)牙螺紋JIS B 0211-1982（ 單位： mm）螺紋尺寸鑽頭直徑崁合度區(qū)分：中（注 1）2級(jí)（注 2）下孔徑崁合度區(qū)分：中（註 1）2級(jí)（註 2）內(nèi)螺紋小徑最小直徑最大直徑M 26 1.524.524.62 (85%)24.37624.6

12、7627 22525.2(85%)24.83525.21027 1.525.525.62 (85%)25.37625.67627 12626.13 (80%)25.91726.15328 22626.2(85%)25.83526.21028 1.526.526.62 (85%)26.37626.67628 12727.13 (80%)26.91727.15330 32727.2(85%)26.75227.25230 22828.2(85%)27.83528.21030 1.528.528.62 (85%)28.37628.67630 12929.13 (80%)28.91729.15332 2

13、3030.2(85%)29.83530.21032 1.530.530.62 (85%)30.37630.67633 33030.2(85%)29.75230.25233 23131.2(85%)30.83531.21033 1.531.531.62 (85%)31.37631.67635 1.533.533.62 (85%)33.37633.67636 33333.2(85%)32.75233.25236 23434.2(85%)33.83534.21036 1.534.534.62 (85%)34.37634.67638 1.536.536.62 (85%)36.37636.67639 3

14、3636.2(85%)35.75236.25239 23737.2(85%)36.83537.21039 1.537.537.62 (85%)37.37637.67640 33737.2(85%)36.75237.25240 23838.2(85%)37.83538.21040 1.538.538.62 (85%)38.37638.67642 43838.1(90%)37.67038.27042 33939.2(85%)38.75239.25242 24040.2(85%)39.83540.21042 1.540.540.62 (85%)40.37640.67645 44141.1(90%)4

15、0.67041.27045 34242.2(85%)41.75242.25245 24343.2(85%)42.83543.21045 1.543.543.62 (85%)43.37643.67648 44444.1(90%)43.67044.27048 34545.2(85%)44.75245.25248 24646.2(85%)45.83546.21048 1.546.546.62 (85%)46.37646.67650 34747.2(85%)46.75247.25250 24848.2(85%)47.83548.21050 1.548.548.62 (85%)48.37648.676註

16、 (1)等級(jí)：6H(2)基於 JIS B 0211-1982 標(biāo)準(zhǔn)螺紋下孔徑表美制粗牙螺紋(單位：mm)螺紋尺寸2B 級(jí) 螺 紋 下孔徑內(nèi)螺紋小徑鑽頭直徑最小直徑最大直徑NO.1 -64UNC1.551.57 (65%)1.4251.5822 -561.81.86 (65%)1.6951.8713 -482.12.14 (65%)1.9412.1464 -402.32.36 (70%)2.1572.3855 -402.62.69 (70%)2.4872.6976 -322.82.86 (75%)2.6422.8958-323.43.52(75%)3.3023.53010-243.93.91(8

17、0%)3.6833.96212-244.54.57(80%)4.3444.5971/4-205.15.25(80%)4.9795.2575/16-186.66.72(80%)6.4016.7313/8-1688.15(80%)7.7988.1537/16-149.49.50(80%)9.1449.5501/2-1310.811.0(80%)10.59211.0239/16-1212.212.3(85%)11.98912.4465/8-1113.613.8(85%)13.38613.8683/4-1016.516.8(80%)16.30716.8407/8-919.519.6(85%)19.17

18、719.7611-822.222.5(85%)21.97122.6061 1/8-72525.2(85%)24.63825.3491 1/4-728.228.4(85%)27.81328.5241 3/8-630.831.0(85%)30.35331.1151 1/2-63434.2(85%)33.52834.2901 3/4-539.539.8(85%)38.96439.8272- 445.245.3(90%)44.67945.593螺紋下孔徑表美制細(xì)牙螺紋（單位：mm）螺紋尺寸鑽頭直徑2B 級(jí) 下孔螺紋 徑內(nèi)螺紋小徑最小直徑最大直徑NO. 0 -80UNF1.251.30(65%)1.18

19、21.3051 -721.551.61(65%)1.4741.6122 -641.851.90(65%)1.7561.9123 -562.12.17(70%)2.0252.1974 -482.42.44(70%)2.2712.4585 -442.72.74(70%)2.5512.7406 -402.93.02(70%)2.8203.0228 -363.53.59(75%)3.4043.60610 -324.14.14(80%)3.9634.16512 -284.64.70(80%)4.4964.7241/4 -285.55.56(80%)5.3605.5885/16 -246.97.02(80

20、%)6.7827.0353/8 -248.58.61(80%)8.3828.6367/16 -209.910.01(80%)9.72910.0331/2 -2011.511.60(80%)11.32911.6079/16 -1812.913.07(80%)12.75113.0815/8 -1814.514.65(80%)14.35114.6813/4 -1617.517.59(85%)17.32317.6787/8 -1420.520.6(85%)20.27020.6751-1223.223.5(85%)23.11423.57111/8 -1226.526.7(80%)26.28926.746

21、11/4 -1229.529.9(80%)29.46429.92113/8 -1232.833.0(85%)32.63933.09611/2 -123636.2(85%)35.81436.271螺紋下孔徑表縫紉機(jī)螺紋(SM)(單位： mm)螺紋尺寸2B 級(jí) 螺 紋 下孔徑2級(jí) 內(nèi) 螺 紋 小 徑鑽頭直徑最小直徑最大直徑SM 1/16 - 801.251.28(75%)1.2111.2815/64 - 641.551.57(80%)1.5131.5933/32 -1002.102.15(70%)2.0812.1563/32 - 561.851.91(80%)1.8411.9361/8- 442.

22、502.58(80%)2.4852.6051/8- 402.452.52(80%)2.4212.5519/64 - 402.852.91(80%)2.8182.94811/64 - 403.653.71(80%)3.6123.7423/16 - 323.903.94(80%)3.8203.9803/16 - 283.703.82(80%)3.6843.8447/32 - 324.704.73(80%)4.6144.77415/64 - 284.905.01(80%)4.8755.0551/4- 405.605.69(80%)5.5965.7261/4- 285.305.41(80%)5.272

23、5.452縫紉機(jī)螺紋(SM)(單位： mm)螺紋尺寸鑽頭直徑2B 級(jí) 下螺紋 孔徑2級(jí) 內(nèi) 螺 紋 小 徑最小直徑最大直徑SM 1/4- 245.105.25(80%)5.0865.2669/32 - 286.106.20(80%)6.0666.2569/32 - 205.705.82(80%)5.6345.8245/16 - 286.906.00(80%)6.8607.0505/16 - 246.706.84(80%)6.6746.8645/16 - 186.306.38(85%)6.2546.4443/8- 288.508.58(80%)8.4478.6373/8- 187.907.97(

24、85%)7.8438.0537/16 - 2810.1010.17(80%)10.03410.2247/16 - 169.309.36(85%)9.2209.4401/2- 2811.7011.76(80%)11.62211.8121/2- 2011.3011.38(80%)11.19011.4101/2- 1210.3010.36(85%)10.18010.420螺紋尺寸下孔徑嵌合率A 列 （ 硬材質(zhì)）B 列 （軟材質(zhì)）A 列直徑B 列直徑內(nèi)螺紋最小徑內(nèi)螺紋最大徑W 1/82.62.570.783.070.088.33/163.73.678.485.870.088.31/45.15.076.

25、983.070.588.35/166.66.574.099.570.188.43/88.07.975.080.069.588.27/169.49.373.780.069.088.81/210.710.573.881.269.088.29/1612.312.073.484.469.088.25/813.713.573.580.369.688.53/416.716.572.378.469.688.37/819.519.375.480.970.188.4122.422.073.883.671.088.21 1/825.024.876.981.372.088.41 1/428.328.074.380.

26、772.088.41 3/830.530.381.685.373.888.61 1/233.833.579.384.873.888.61 5/836.035.781.185.774.888.31 3/439.239.080.783.874.888.31 7/841.841.580.684.774.788.4245.044.780.284.474.788.4（單位：mm）螺紋下孔徑表英制粗牙螺紋螺紋下孔徑表英制管用螺紋（單位：mm）管用螺紋尺寸JIS B 0203JIS B 2301錐管內(nèi)螺紋Rc（PT）平行內(nèi)螺紋Rp（PS）錐管內(nèi)螺紋計(jì)算值下孔徑計(jì)算值下孔徑計(jì)算值下孔徑1/166.2306.2

27、6.4906.51/88.2358.28.4958.58.1918.21/410.94110.911.34111.410.94510.93/814.42814.414.84614.914.38814.41/217.9501818.48918.517.943183/423.3492323.9752423.30523129.4232930.1113029.353291 1/437.9403838.7723937.890381 1/243.8334444.5654543.72043255.4125556.4765655.406552 1/270.7017172.0097270.78870383.20

28、18384.7098583.364833 1/295.5479697.1559795.747954107.834108109.855110108.3221085133.110133135.255135133.5971336158.510159160.655161158.8101587183.360183185.9541868208.560209211.3542129233.960234236.75423710259.166259262747310312.8753131982 年由於 ISO 進(jìn)入， JIS 管用螺紋規(guī)格得到修訂，螺紋代號(hào)有了變更，但螺紋 精度沒(méi)有改變。

29、因此絲攻的名稱還是延用了舊代號(hào)。JIS B 0202-1982JIS B 0203-1982總類舊記號(hào)新記號(hào)耐密用斜行母螺紋PTRc耐密用平行母螺紋PSRp機(jī)械連結(jié)用平行母螺紋PFG螺紋下孔徑表英制平行管用螺紋PF（G）（單位： mm）螺紋下孔徑內(nèi)螺紋小徑（參考）尺寸大徑標(biāo)準(zhǔn)嵌合高度H系列1009590858075706560最小直徑最大直徑G 1/167.7230.58086.566.626.686.746.796.856.916.977.036.8436.561G(PF)1/89.7288.578.628.688.748.808.868.928.979.038.8488.5661/413.

30、1570.856011.5311.6211.7011.7911.8711.9612.0412.1311.89011.4453/816.66214.9515.0415.1215.2115.2915.3815.4615.5515.6415.39514.9501/220.9551.161818.818.919.019.119.219.319.419.619.17218.6315/822.91120.620.720.820.921.021.221.321.421.521.13020.5893/426.44124.224.424.524.624.724.824.925.024.65824.1177/83

31、0.20127.928.028.128.228.338.528.628.728.828.41827.877133.24914.78630.330.430.630.730.931.031.231.331.530.93130.2911 1/837.89735.135.235.435.535.735.835.936.535.57934.9391 1/441.91039.039.139.239.439.639.739.840.040.139.59238.9521 3/844.32341.441.541.741.842.042.142.242.442.642.00541.3651 1/247.80345

32、.045.145.345.445.645.745.946.045.48549.0231 5/851.91049.249.349.549.649.849.950.050.249.67250.7881 3/453.74650.850.951.151.251.451.551.752.052.051.42856.656259.61456.857.057.157.257.457.557.857.857.296使用粗線左側(cè)數(shù)據(jù)作為攻絲前的底孔直徑，可加工符合JIS B 0202 的 A級(jí)或 B 級(jí)的內(nèi)螺紋小徑。美制斜行管用螺紋(NPT?NPS)(單位： mm)管用螺紋尺寸斜行螺紋(NPT)平行螺紋(NPS

33、)鑽頭直徑使用鉸刀場(chǎng)合不使用鉸刀場(chǎng)合鑽頭直徑1/160.234 ( 5.94)0.246 ( 6.15)1/40.250 ( 6.35)1/821/640.328 ( 8.33)0.332 ( 8.43)11/320.344 ( 8.74)1/427/640.422 (10.72)7/160.438 (11.13)7/160.438 (11.13)3/89/160.562 (14.27)9/160.562 (14.27)37/640.578 (14.68)1/211/160.688 (17.48)45/640.703 (17.86)23/320.719 (18.26)3/457/640.891

34、 (22.63)29/320.906 (23.01)59/640.922 (23.42)111/81.125 (28.58)1 9/641.141(28.98)1 5/321.156 (29.36)1 1/41 15/321.469 (37.31)1 31/641.484 (37.69)11/21.500 (38.10)1 1/211/161.703 (43.26)1 23/321.719 (43.66)1 3/41.750 (44.45)22 11/642.172 (55.17)2 3/162.188 (55.58)2 7/322.219 (56.36)2 1/22 39/642.578 (

35、65.48)2 39/642.609 (66.27)2 21/322.656 (67.46)上述鑽頭直徑來(lái)源於美制管用螺紋ANSI ASME B1.20.1 1983 Pipe Threads, General Purpose (Inch) 標(biāo)準(zhǔn)螺紋下孔徑表美制管用耐密斜行螺紋(NPTF?NPSF)(單位：mm)管用螺紋尺寸斜行螺紋(NPTF)平行螺紋(NPSF)鑽頭直徑鑽頭直徑使用鉸刀場(chǎng)合不使用鉸刀場(chǎng)合1/160.234( 5.94)0.246( 6.25)1/40.250 ( 6.35)1/821/640.328( 8.33)0.339( 8.61)11/320.344 ( 8.74)1/

36、427/640.422(10.72)7/160.438(11.13)0.444 (11.28)3/89/160.562(14.27)37/640.578(14.68)37/640.578 (14.68)1/211/160.688(17.48)45/640.703(17.86)23/320.719 (18.26)3/457/640.891(22.63)59/640.922(23.42)0.922 (23.42)11 1/81.125(28.58)1 5/321.156(29.36)1 5/321.156 (29.36)1 1/41 15/321.469(37.31)11/21.500(38.10

37、)1 1/2145/641.703(43.26)147/641.734(44.04)22 3/162.188(55.58)2 7/322.219(56.36)2 1/22 19/322.594(65.89)2 41/642.641 (67.08)上述鑽頭直徑來(lái)源於美制管用耐密斜行螺紋ANSI B1.20.3 1957 Dryseal Pipe Threads (Inch) 標(biāo)準(zhǔn)螺紋尺寸1 級(jí)螺紋用下孔徑2 級(jí)螺紋用下孔徑RH 精度最小最大（嵌合率）RH 精度最小最大（嵌合率）M 1 0.2520.87 0.89(10085)40.90 0.92 (10080)1.1 0.2520.97 0.9

38、9(10085)41.00 1.02 (10080)1.2 0.2521.07 1.09(10085)41.10 1.12 (10080)1.4 0.321.244 1.263 (10085)41.270 1.294 (10080)1.7 0.3521.51 1.54(10080)41.54 1.58 (10075)2 0.421.78 1.82(10080)41.81 1.85 (10075)2.3 0.422.08 2.12(10080)42.11 2.15 (10075)2.5 0.4522.25 2.29(10080)42.28 2.33 (10075)2.6 0.4522.35 2.

39、39(10080)42.38 2.43 (10075)3 0.532.74 2.78(10080)52.76 2.81 (10075)3.5 0.633.18 3.21(10085)53.20 3.26 (10075)4 0.743.63 3.67(10085)63.65 3.70 (10085)5 0.844.57 4.62(10085)64.59 4.66 (10080)6 145.45 5.51(10085)75.48 5.57 (10080)7 146.45 6.51(10085)76.48 6.57 (10080)8 1.2557.31 7.38(10085)77.34 7.41 (

40、10085)8 147.45 7.51(10085)77.48 7.57 (10080)10 1.559.16 9.22(10090)79.18 9.28 (10085)10 1.2559.31 9.38(10085)79.34 9.41 (10085)10 159.46 9.52(10085)79.48 9.57 (10080)12 1.75511.01 11.08(10090)811.05 11.15 (10085)12 1.5511.16 11.22(10090)711.18 11.28 (10085)12 1.25511.31 11.38(10085)711.34 11.41 (100

41、85)12 1511.46 11.52(10085)711.48 11.57 (10080)14 2612.83 12.95(10090)1012.92 13.04 (10085)14 1.5513.16 13.22(10090)913.21 13.30 (10085)16 2614.87 14.95(10090)1014.92 15.04 (10085)16 1.5515.16 15.22(10090)915.21 15.30 (10080)18 2.5616.57 16.67(10090)1116.63 16.78 (10085)18 1.5617.17 17.23(10090)1017.

42、22 17.31 (10085)20 2.5618.57 18.67(10090)1118.63 18.78 (10085)20 1.5619.17 19.23(10090)1019.22 19.31 (10085)（單位：mm）螺紋下孔徑表（無(wú)屑絲攻用）公制螺紋（NRT）（ 單位：mm）螺紋下孔徑表（無(wú)屑絲攻用）美制粗牙螺紋（NRT）螺紋尺寸2B 級(jí)螺紋用下孔徑3B 級(jí)螺紋用下孔徑RH 精度最小最大（嵌合率）RH 精度最小最大（嵌合率）NO. 2-56UNC41.96 2.02 (10065)31.95 2.01(10065)3-4842.25 2.32 (10065)32.23 2.31(

43、10065)4-4052.52 2.60 (10070)32.50 2.58 (10070)5-4052.86 2.93 (10070)32.83 2.91(10070)6-3253.09 3.17 (10075)33.06 3.14 (10075)8-3263.75 3.83 (10075)43.74 3.82 (10075)10-2464.26 4.35 (10080)44.24 4.32 (10080)12-2464.92 5.01 (10080)44.90 4.96 (10085)1/4 -2065.66 5.76 (10080)45.64 5.74 (10080)5/16 -1877

44、.18 7.29 (10080)57.15 7.24 (10085)3/8 -1678.66 8.78 (10080)58.63 8.73 (10085)7/16 -14710.11 10.25 (10080)510.08 10.19(10085)1/2 -13810.62 11.78 (10080)611.60 11.68(10090)9/16 -121013.14 13.27 (10085)813.11 13.24(10085)5/8 -111114.62 14.76 (10085)814.58 14.67(10090)3/4 -101217.67 17.88 (10080)917.63

45、17.74(10090)7/8 - 91220.68 20.85 (10085)920.64 20.75(10090)1- 81323.65 23.84 (10085)1023.61 23.74(10090)螺紋下孔徑表（無(wú)屑絲攻用）美制細(xì)牙螺紋（NRT）（單位：mm）螺紋尺寸2B 級(jí)螺紋用下孔徑3B 級(jí)螺紋用下孔徑RH 精度最小最大（嵌合率）RH 精度最小最大（嵌合率）NO. 2-64UNF31.98 2.04 (10065)21.97 2.03 (10065)3-5642.29 2.35 (10065)32.28 2.34 (10065)4-4842.57 2.64 (10070)32.5

46、6 2.63 (10070)5-4442.88 2.95 (10070)32.87 2.94 (10070)6-4053.19 3.26 (10070)33.16 3.22 (10075)8-3653.80 3.88 (10075)43.79 3.86 (10075)10-3254.41 4.48 (10080)44.40 4.46 (10080)12-2855.00 5.08 (10080)44.99 5.06 (10080)1/4 -2855.86 5.93 (10080)45.85 5.92 (10080)5/16-2467.38 7.46 (10080)57.36 7.43 (1008

47、5)3/8 -2468.96 9.05 (10080)58.95 9.02 (10085)7/16-20710.44 10.54 (10080)510.41 10.49 (10085)1/2 -20712.02 12.12 (10080)512.00 12.05 (10090)9/16-18913.55 13.66 (10080)713.53 13.58 (10090)5/8 -18915.14 15.25 (10080)715.11 15.17 (10090)3/4 -161018.22 18.32 (10085)718.18 18.25 (10090)7/8 -141121.27 21.3

48、8 (10085) .821.23 21.27 (10095) .1- 121224.28 24.41 (10085)924.24 24.32 (10090)螺紋尺寸RH 精 度最小最大（嵌合率）PF 1/869.24 9.35 (10080)1/4712.4112.62(10075)3/8715.9216.12(10075)1/2819.9320.15(10080)3/4825.4125.64(10080)英制管用平行螺紋（NRT）（ 單位：mm）螺紋下孔徑表（無(wú)屑絲攻用）公制螺紋（HRT）（單位： mm）螺紋尺寸1 級(jí)螺紋用下孔徑2 級(jí)螺紋用下孔徑RH精度最小最大（嵌合率）RH精度最小最大

49、（嵌合率）M 1 0.2520.8580.879 (10085)40.8580.887 (10080)1.20.2521.0581.079 (10085)41.0581.087 (10080)1.40.321.23 1.26(10085)41.23 1.26(10080)1.60.3521.40 1.44(10080)41.40 1.45(10075)1.70.351.50 1.54(10080)41.50 1.55(10075)1.80.3521.60 1.64(10080)41.60 1.65(10075)2 0.421.77 1.82(10080)41.77 1.82(10080)2 0

50、.2521.8581.887 (10080)1.8581.887 (10080)2.3 0.42.07 2.12(10080)42.07 2.13(10075)2.5 0.4532.24 2.30(10080)52.24 2.31(10075)2.6 0.452.34 2.40(10080)52.34 2.41(10075)3 0.632.72 2.73(10090)52.66 2.73(10090)3 0.552.72 2.77(10080)62.72 2.78(10075)3 0.3532.80 2.84(10080)52.80 2.85(10075)3.5 0.633.16 3.21(1

51、0085)53.16 3.25(10075)4 0.7533.57 3.64(10085)63.57 3.64(10085)4 0.763.60 3.66(10085)73.60 3.66(10085)4 0.533.71 3.77(10080)63.71 3.79(10075)5 0.934.49 4.59(10085)74.49 4.59(10085)5 0.834.55 4.62(10085)84.55 4.64(10080)5 0.532.72 4.77(10080)64.72 4.79(10075)6 145.43 5.52(10085)75.43 5.55(10080)6 0.75

52、35.57 5.64(10085)75.57 5.66(10080)螺紋下孔徑表（護(hù)套螺紋用）公制粗牙螺紋HL-NRT螺紋尺寸RH 精 度最小最大（嵌合率）M 3 0.533.393.43(10080)4 0.744.544.58(10085)5 0.845.615.66(10085)6 146.756.81(10085)8 1.2558.939.01(10085)10 1.5511.1111.17 (10090)10 1.25510.9311.01(10085)12 1.75513.2813.17(10090)12 1.5513.1113.17(10090)12 1.25512.9313.0

53、1(10085)螺紋下孔徑表（護(hù)套螺紋用）公制粗牙螺紋（單位：mm）螺紋尺寸下孔徑鑽頭直徑最小直徑最大直徑M 2.5 0.452.602.652.62.6 0.452.702.752.73 0.53.123.203.14 0.74.174.304.25 0.85.165.335.26 16.256.426.38 1.258.318.528.410 1.510.3710.6210.512 1.7512.4312.7312.514 214.4914.8314.516 216.4916.8316.518 2.518.5819.0419.020 2.520.5821.0421.022 2.522.5823.0423.024 2.524.7025.2525.0公制細(xì)牙螺紋（單位：mm）螺紋尺寸下孔徑鑽頭直徑最小直徑最大直徑M 10 110.2510.4210.310 1.2510.3110.5210.412 1.2512.3112.5212.512 1.512.3712.6212.514 1.514.3714.6214.516 1.516.3716.6216.518 1.518.3718