篇一：螺纹底孔尺寸对照表图
螺
纹
攻
牙
钻
孔
径
和
滚
造
径
对
照
表公
制
粗
螺
纹规格M1.0*0.25M1.1*0.25M1.2*0.25M1.4*0.3M1.6*0.35M1.7*0.35M1.8*0.35M2.0*0.4M2.2*0.45M2.3*0.4M2.5*0.45M2.6*0.45M3.0*0.5M3.0*0.6M3.5*0.6M4.0*0.7M4.0*0.75M4.5*0.75M5.0*0.8M5.0*0.9M6.0*1.0M7.0*1.0M8.0*1.25M9.0*1.25M10*1.5M11*1.5M12*1.75M14*2.0M16*2.0M18*2.5M20*2.5M22*2.5M24*3.0M27*3.0M30*3.5标准径0.750.850.951.101.251.351.451.601.751.902.102.202.502.402.903.303.253.804.204.105.006.006.807.808.509.5010.3012.0014.0015.5017.5019.5021.0024.0026.502级牙钻孔径最大0.7850.8850.9851.1421.3211.4211.5211.6791.8381.9792.1382.2382.5992.4403.0103.4223.3263.8784.3344.1705.1536.1536.9127.9128.6769.67610.44112.21014.21015.74417.74419.74421.25224.25226.771最小0.7290.8290.9291.0751.2211.3211.4211.5671.7131.8672.0132.1132.4592.2802.8503.2423.1063.6884.1343.9304.9175.9176.6477.6478.3769.37610.10611.83513.83515.29417.29419.29420.75223.75226.211M12*1.0M12*0.5M14*1.5M14*1.0M15*1.5M15*1.0M16*1.5M16*1.0M17*1.5M17*1.0M18*2.0M18*1.5M18*1.0M20*2.0M20*1.5M20*1.0M22*2.0M22*1.5M22*1.0M24*2.0M24*1.5M24*1.0M25*2.0M25*1.5M25*1.0M26*1.5M27*2.0M27*1.5M27*1.0M28*2.0M28*1.5M28*1.0M30*3.0M30*2.0M30*1.5M30*1.0M32*2.0M32*1.5M33*3.0M33*2.0M33*1.5M35*1.5M36*3.0M36*2.0M36*1.5公
制
细
螺
纹规格标准径11.0011.5012.5013.0013.5014.0014.5015.0015.5016.0016.0016.5017.0018.0018.5019.0020.0020.5021.0022.0022.5023.0023.0023.5024.0024.5025.0025.5026.0026.0026.5027.0027.0028.0028.5029.0030.0030.5030.0031.0031.5033.5033.0034.0034.502级牙钻孔径最大11.15311.52012.67613.15313.67614.15314.67615.15315.67616.15316.21016.67617.15318.21018.67619.15320.21020.67621.15322.21022.67623.15323.21023.67624.15324.67625.21025.67626.15326.21026.67627.15327.25228.21028.67629.15330.21030.67630.25231.21031.67633.67633.25234.21034.676最小10.91711.40012.37612.91713.37613.91714.37614.91715.37615.91715.83516.37616.91717.83518.37618.91719.83520.37620.91721.83522.37622.91722.83523.37623.91724.37624.83525.37625.91725.83526.37626.91726.75227.83528.37628.91729.83530.37629.75230.83531.37633.37632.75233.83534.376公
制
迫
牙
丝
攻
钻
孔
径规格M1.0*0.25M1.1*0.25M1.2*0.25M1.4*0.3M1.6*0.35M1.7*0.35M1.8*0.35M2*0.4M2.2*0.45M2.3*0.4M2.5*0.45M2.6*0.45M3.0*0.5M3.5*0.6M4.0*0.7M5.0*0.8M6.0*1.0M7.0*1.0M8.0*1.25M10*1.5M10*1.25M12*1.75M12*1.25精度等级G4-G6G7-G8G90.860.880.960.981.061.081.241.251.411.431.511.531.611.631.781.801.951.982.082.102.252.282.352.382.732.753.173.203.623.653.694.564.604.645.455.505.556.456.506.557.317.387.449.189.259.329.319.389.4411.0411.1211.2111.3111.3811.44英制平行管用螺紋PF(G)(單位：mm)规格G1/16G(PF)1/81/43/81/25/83/47/811.1251.251.3751.51.6251.752大径7.729.7313.1616.6620.9622.9126.4430.2033.2537.9041.9144.3247.8051.9153.7559.61最大6.848.8511.8915.4019.1721.1324.6628.4230.9335.5839.5942.0149.0250.7956.66钻孔径最小6.568.5711.4514.9518.6320.5924.1227.8830.2934.9438.9541.3745.4949.6751.4357.30英
制
管
螺
纹规格PS1/16-28PS1/8-28PS1/4-19PS3/8-19PS1/2-14PS3/4-14PS1-11PS1-1/4-11PS1-1/2-11PS2-11标准径6.508.5011.4015.0018.5024.0030.2038.8044.8056.50最大6.6328.63711.54915.05418.77324.25930.47139.13245.02556.836钻孔径最小6.4908.49511.34114.84618.48923.97530.11138.77244.66556.476注：迫牙丝攻之钻孔径，在上表所列之数值，由于被加工材料之材质、硬度、形状、尺寸等之影响，多少会有所变动，因此于参考上表之同时，亦请增减若干。美
制
粗
螺
纹规格(UNC)
(螺丝牙外径)标准径2级牙钻孔径最大1.5821.8712.1462.3852.6972.8953.5303.9624.5975.2576.7318.1539.55011.02312.44612.86818.84019.76122.60625.34928.52431.11534.29039.82745.593最小1.4251.6951.9412.1572.4872.6423.3023.6834.3444.9796.4017.7989.14410.59211.98913.38616.30719.17721.97124.63827.81330.35333.52838.96444.679公
制
细
螺
纹规格M1.0*0.2M1.1*0.2M1.2*0.2M1.4*0.2M1.6*0.2M1.7*0.2M1.8*0.2M2.0*0.25M2.2*0.25M2.3*0.25M2.5*0.35M2.6*0.35M3.0*0.35M3.5*0.35M4.0*0.5M4.5*0.5M5.0*0.5M5.5*0.5M6.0*0.75M6.0*0.5M7.0*0.75M7.0*0.5M8.0*1.0M8.0*0.75M8.0*0.5M9.0*1.0M9.0*0.75M10*1.25M10*1.0M10*0.75M10*0.5M11*1.0M11*0.75M12*1.5M12*1.25标准径0.800.901.001.201.401.451.601.751.952.052.202.202.703.203.504.004.505.005.305.506.306.507.007.307.508.008.308.809.009.309.5010.0010.3010.5010.802级牙钻孔径最大0.8210.9211.0211.2211.4211.5001.6211.7851.9852.0612.2212.2462.721最小0.7830.8830.9831.1831.3831.4601.5831.7291.9292.0012.1212.1862.621美
制
细
螺
纹规格(UNF)
(螺丝牙外径)标准径2级牙钻孔径最大1.3051.6121.9122.1972.4582.7403.0223.6064.1654.7245.5887.0358.63610.03311.60713.08114.68117.67820.67523.57126.74629.92133.09636.271最小1.1821.4741.7562.0252.2712.5512.8203.4043.9634.4965.3606.7828.3829.72911.32912.75114.35117.32320.27023.11426.28929.46432.63935.8143.2213.1213.5993.4594.0993.9594.5994.4595.0994.9595.3785.1885.5505.4006.3786.1886.5506.4007.1536.9177.3787.1887.5207.4008.1537.9178.3788.1888.9128.4679.1538.9179.3789.1889.5209.40010.1539.91710.37810.18810.67610.37610.91210.647No.0-80(1.524)No.1-72(1.854)No.2-64(2.184)No.3-56(2.515)No.4-48(2.845)No.5-44(3.175)No.6-40(3.505)No.8-36(4.166)No.10-32(4.826)No.12-28(5.846)1/4-285/16-243/8-247/16-201/2-209/16-185/8-183/4-167/8-141-121-1/8-121-1/4-121-3/8-121-1/2-121.251.551.852.102.402.702.903.504.104.605.506.908.509.9011.5012.9014.5017.5020.5023.2026.5029.5032.8036.0No.1-64(1.854)No.2-56(2.184)No.3-48(2.515)No.4-40(2.845)No.5-40(3.175)No.6-32(3.505)No.8-32(4.166)No.10-24(4.826)No.12-24(5.486)1/4-205/16-183/8-167/16-141/2-139/16-125/8-113/4-107/8-91-81-1/8-71-1/4-71-3/8-61-1/2-61-3/4-52-4-1/21.551.802.102.302.602.803.403.904.505.106.608.009.4010.8012.2013.6016.5019.5022.2025.0028.2030.8034.00
篇二：螺纹底孔尺寸对照表图
螺纹底孔尺寸对照表序号12345678910111213141516171819202122232425262728293031323334353637螺纹种类及螺距M3x0.5M4x0.7M5x0.8M6x1M8x1.25M10x1.5M12x1.75M14x2M16x2M18x2.5M20x2.5M24x3M30x3.5M36x4M42x4.5M48x55/8-11UNC3/4-10UNC锥度管螺纹RC（PF)RC1/8(PT)RC1/4(PT)RC3/8(PT)RC1/2(PT)RC3/4(PT)RC1(PT)RC1+1/4(PT)RC1+1/2(PT)RC2(PT)RC2+1/2(PT)平行管螺纹G(PF)G1/8(PF)G1/4(PF)G3/8(PF)G1/2(PF)G5/8(PF)G3/4(PF)G1(PF)Φ8.6Φ11.5Φ8.8Φ11.87Φ15.38Φ19.1Φ21Φ24.6Φ30.9Φ8.2Φ10.9Φ14.4Φ18Φ23.5Φ29.5Φ38Φ44Φ55Φ71Φ8.5Φ11.1Φ14.6Φ18.5Φ23.8Φ29.9Φ38.5Φ44.6Φ55.6Φ71.6螺纹孔底直最大孔底直径径Φ2.5Φ2.59Φ3.3Φ4.2Φ5Φ6.8Φ8.5Φ10.2Φ12Φ14Φ15.5Φ17.5Φ21Φ26.5Φ32Φ37.5Φ43Φ13.6Φ16.6Φ3.42Φ4.33Φ5.2Φ6.9Φ8.6Φ10.4Φ12.1Φ14.2Φ15.7Φ17.7Φ21.2Φ26.7Φ32.2Φ37.743.2Φ13.8Φ16.8
篇三：螺纹底孔尺寸对照表图
螺纹基本尺寸对照表
（以及螺纹底孔相关尺寸）
参照机械设讣师首册编制OPMSM2005年7月
螺纹代号
Threadcode
一、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）
二、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
三、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一一管接头直管内螺纹
NPSM——设备上自山配合，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
四、米制螺纹（螺纹牙型角60度，斜角为1。47’即1：16）
ZM——米制锥管螺纹
五、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）
六、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—一圆锥外螺纹（螺纹牙型角55度，斜角为1。47’即1：16）
七、普通螺纹（螺纹牙型角60度）
M——普通螺纹代号
八、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30X30度）
螺纹公称直径d2螺距p0?40.250.50.350.0.50.0.50.751.25钻头直径d铜
1?61?752?52?153.33.54.14?54.5?26.67.1&4&66.7.110.11().410.610.11.12.412.13.14.414.15.315.16.416.17.317.18.418.不锈钢
1?61?752?52?153?33?54?24?55?26?7?28?58?7?210.210.510.111212.5131414.51515.51616.5117.5118.510.751?51?250.751?751.51.251.51.52?51.52.5121416121.52?5221.52419.319.20.420.20.21.22.422.19.5220.521212222.5231.5非螺纹密封英制
螺纹直径
1/1/43/1/23/4bl/41-3/L1/2英制锥管螺纹
螺纹直径
1/1/43/1/23/41-1/41-1/2英制锥螺纹
螺纹直径
1/1/43/1/23/41-1/41-1/2牙数
钻头直径
211141411111111牙数
211141414111111钻头直径
8?411.214.18.323.629.38.344?155.牙数
钻头直径
8?611.114.517.23.229.237.43.56&11.15.21&24?430.639.241.645.1271818141411.511.511.511.5螺距(t)螺纹长度
有效长度
基面长度
4.5667.59.5111314161&520.525.5外径(d)9.7313.1616.6620.9626.4433.2541.9147.8159.6275.1987.89113.03基面上螺纹直径
中径(d2)9.1512.315.8119.7925.2831.7740.4346.335&1473.7186.41111.56内径(dl)8.5711.4514.9518.6324.1230.293&9544.8556.6672.2384.93110.08牙型高度(hl)0.911.341.341.811.812.312.312.312.312.312.312.31911121517192223263（）
32380.580.860.861.161.161.481.481.481.481.481.481.48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dl=d?1.28t3/4"=26.44?1?28*1.81=24.12斜角（4＞）1°47Q4"
锥角（2炽4＞）=1:16公称
直每英
径
寸牙
（英
数5）
寸）
1/81/43/81/25/83/47/811-1/41-3/81-1/21-3/422-1/23281919141414141111111111111111螺
距
管子外径（d）
(t)名义
最大外径
尺寸
0.911.341.34L811-81L811.812.312.312.312.312312.312.312319.739.689.3812.7416.2420.522.4625.9729.7332.7541.3643.7847.2153.1459.0174.5487.1913.1613.116.6616.620.9620.8922.9122.8526.4426.3830.230.14最小外径
管接头螺纹内径（dP）
名义
尺最大内径
最小内径
寸
8.5711.4514.9518.6320.5924.1227.8830.2938.9541.3744.8550.7956.6672.2384.938.9211.8415.3519.0521.0124.5728.3330.7939.4641.8745.451.3457.2172.8385.588.6711.5615.0618.7520.7124.2528.0130.4339.141.514550.9456.8172.3985.1牙型
高度
（hl）
0.580.860.861.161.161.161.161.481.481.481.481.481.481.481.4833.2533.1841.914L8444.3344.2647.8147.7453.7553.6759.6259.5475.1975.1187.8987.8外径d由公称直径所决定
螺纹内径dl=d-L28t斜角(4>)1。47Q4"锥角(2址4>)=1:16公称直
径每英寸
牙螺距
数(n)(英
(t)寸)
1/161/81/43/81/23/411-1/41-1/22螺纹长度
有效长度
6.579.510.513.51417.51818.51基面上螺纹直径
中径(d2)7.149.5212.4415.9319.7725.1231.4640.2246.2958.33牙型
高度
(hl)0.750.751.131.131.451.451.771.771.771.7基面长度
外径(d)4.064.575.086.18.138.6110.1610.6710.6711.0内径(dl)6.398.7711.3114.818.3223.6729.693&4544.5256.5627271818141411-1/211-1/211-1/211-1/20.940.941.411.411.811.812.212.212.212.217.910.2713.5717.0621.2226.5733.2341.9948.0560.0外径d由公称直径所决定
牙型高度hl=0.8t基面上螺纹内径＜H=d-1.6t
3/8"=17.06mmdl=17.06?1.6*1.41=14.8斜角（4＞）1°47Q4"锥角（2t"）=l:16公称宜径
3/16〃
1/4〃
5/16"3/8”
7/16"1/2〃
9/16"5/8"3/4”
7/8”
1-1/1-1/4M每寸牙数
2420181614121211109877螺距(t)L061.271.411.59L812.122.122.312.542.823.183.633.63名义尺寸
4.636.27.789.3610.9312.514.0815.6518.8121.9625.112&2531.43外螺纹外径
最大尺寸
4.56.057.629.210.7512.313.8715.4318.5721.724.8227.9331.09最小尺寸
4.245.757.318.910.4511.913.4715.0318.1721.224.3227.3330.49名义尺寸
3.564.916.347.739.0610.311.8913.2616.1719.0321.824.4627.64内螺纹内径
最大尺寸
3.975.396.868.299.6710.9612.5613.9416.9219.8222.6725.4328.59最小尺寸
3.715.16.557.979.3310.6112.213.616.5419.4522.2724.992&1选用钻头
0>3.705.106.507.909.3010.5012.1013.5016.4019.50>22r
/z
1-3/8/z
1-1/21-3/41-7/2"z/z/664.234.235.085.645.6434.5637.7344.0247.1550.3234.237.3643.5946.6849.8433.630.1333.313&741.2344.4131.2334.3839.9542.5845.7930.7633.9439.4542.0645.2536.7642.7945.8849.0454545内螺纹（d?）公称直径
外螺纹(dl)内径
d"-1.28t外螺纹(dlz)内径
d，?1.13413/4"=19.05imn3/4"=19.05-1.28*2.54=15.79nun3/4"=19.05-1.134*2.54=16.16nun公称直径
（英每英寸牙数
寸）
（n）
螺距⑴
外螺纹外径
名义尺寸
d=d,-0.075t-0.05内螺纹内径
名义尺寸
11/163/87/85/83/41/41420111412261.8141.272.31L812.120.97617.289.382215.6918.846.2315.48.0819.613.8216.655.241/21161.5872.5412.5325.1510.922.5210内螺纹d?（公称直径）
外螺纹
dl=内径=d,-1.28t3/4"=19.05-1.28*2.116=16.34内螺纹
dl二内径=d,-1.134t3/4"=19.05-L134*2.116=16.653/4"=12牙戾寸
#2.116
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