标准螺纹下孔孔径表
各种螺纹详细参数和钻孔直径对照表
19/64
15/32
11/4
115/32
131/64
11/2
11/2
11/16
123/32
13/4
2
211/64
23/16
27/32
21/2
239/64
239/64
221/32
上述钻头直径來源於美制管用螺纹ANSI／ASME —1983 Pipe Threads, General Purpose (Inch)標準
7
~ (100~80)
14×2
6
~ (100~90)
10
~ (100~85)
14×
5
~ (100~90)
9
~ (100~85)
16×2
6
~ (100~90)
10
~ (100~85)
16×
5
~ (100~90)
9
~ (100~80)
18×
6
~ (100~90)
11
~ (100~85)
18×
6
~ (100~90)
45 × 4
41
(90%)
45 × 3
42
(85%)
45 × 2
43
(85%)
45 ×
(85%)
48 × 4
44
(90%)
48 × 3
45
(85%)
48 × 2
46
(85%)
48 ×
(85%)
50 × 3
47
(85%)
50 × 2
48
(85%)
50 ×
(85%)
註(1)等級：6H
(2)基於JIS B 0211-1982標準
螺纹螺距及底孔查询表[新版]
![螺纹螺距及底孔查询表[新版]](https://img.taocdn.com/s3/m/adaae649f11dc281e53a580216fc700abb6852da.png)
60%100%60%100%60%100%60%100%60%100% M1 ×0.250.750.840.73M1 ×0.20.800.870.78W1/16-60 1.20 1.26 1.05Nr.1-64 1.50 1.60 1.42Nr.0-80 1.30 1.32 1.18 M1.1 ×0.250.850.940.83M1.1 ×0.20.900.970.88W3/32-48 1.80 1.97 1.70Nr.2-56 1.80 1.89 1.69Nr.1-72 1.60 1.62 1.47 M1.2 ×0.250.95 1.040.93M1.2 ×0.2 1.00 1.070.98W1/8-40 2.60 2.69 2.36Nr.3-48 2.10 2.17 1.94Nr.2-64 1.90 1.93 1.75 M1.4×0.3 1.10 1.21 1.08M1.4 ×0.2 1.20 1.27 1.18W5/32-32 3.10 3.36 2.95Nr.4-40 2.30 2.43 2.16Nr.3-56 2.10 2.22 2.02 M1.6 ×0.35 1.25 1.37 1.22M1.6 ×0.2 1.40 1.47 1.38W3/16-24 3.60 3.95 3.41Nr.5-40 2.60 2.76 2.49Nr.4-48 2.40 2.50 2.27 M1.7 ×0.35 1.35 1.47 1.32M1.8 ×0.2 1.60 1.67 1.58W7/32-24 4.50 4.74 4.20Nr.6-32 2.75 2.99 2.65Nr.5-44 2.70 2.80 2.55 M1.8 ×0.35 1.45 1.57 1.42M2 ×0.25 1.75 1.84 1.73W1/4-20 5.10 5.37 4.72Nr.8-32 3.50 3.65 3.31Nr.6-40 3.00 3.09 2.82 M2 ×0.4 1.60 1.74 1.57M2.2 ×0.25 1.95 2.07 1.93W5/16-18 6.50 6.85 6.13Nr.10-24 3.80 4.14 3.68Nr.8-36 3.50 3.71 3.40 M2.2 ×0.45 1.75 1.91 1.71M2.5 ×0.35 2.15 2.27 2.12W3/8-167.908.317.49Nr.12-24 4.50 4.80 4.34Nr.10-32 4.10 4.31 3.97 M2.3 ×0.4 1.90 2.04 1.87M3 ×0.35 2.65 2.77 2.62W7/16-149.309.728.791/4-20 5.10 5.53 4.98Nr.12-28 4.70 4.90 4.50 M2.5 ×0.45 2.05 2.21 2.01M3.5 ×0.35 3.15 3.27 3.12W1/2-1210.5011.079.995/16-18 6.507.02 6.411/4-28 5.50 5.76 5.37 M2.6 ×0.45 2.15 2.31 2.11M4 ×0.5 3.50 3.68 3.46W9/16-1212.0012.6611.583/8-167.908.497.815/16-24 6.907.25 6.79 M3 ×0.5 2.50 2.68 2.46M4.5 ×0.5 4.00 4.18 3.96W5/8-1113.5014.1012.927/16-149.309.939.153/8-248.508.848.38 M3 ×0.6 2.40 2.61 2.35M5 ×0.5 4.50 4.68 4.46W3/4-1016.5017.1015.801/2-1310.8011.4310.587/16-209.9010.299.74 M3.5 ×0.6 2.90 3.11 2.85M5.5 ×0.5 5.00 5.18 4.96W7/8-919.2520.0618.619/16-1212.2012.9112.001/2-2011.5011.8811.33 M4 ×0.7 3.30 3.55 3.24M6 ×0.5 5.50 5.68 5.46W1-822.0022.9621.335/8-1113.5014.3813.389/16-1812.9013.3712.76 M4 ×0.75 3.25 3.51 3.19M6 ×0.75 5.25 5.51 5.19W11/8-724.7525.7923.933/4-1016.5017.4016.305/8-1814.5014.9614.35 M4.5 ×0.75 3.75 4.01 3.69M7 ×0.75 6.25 6.51 6.19W11/4-727.7528.9627.107/8-919.5020.3919.173/4-1617.5018.0217.33 M5 ×0.8 4.20 4.48 4.13M8 ×0.757.257.517.19W13/8-630.2031.6729.501-822.2523.3421.967/8-1420.2521.0520.26 M5 ×0.9 4.10 4.70 4.66M8 ×1.07.007.35 6.92W11/2-633.5034.8532.6811/4-728.0029.3927.821-1223.2524.0323.11 M6 ×1.0 5.00 5.35 4.92M9 ×1.08.008.357.92W15/8-535.5037.3734.7713/8-631.0032.1830.3411/8-1226.5027.2026.28 M7 ×1.0 6.00 6.35 5.92M10 ×0.759.259.519.19W13/4-538.5040.5537.9411/2-634.5035.3533.5211/4-1229.5030.3829.46 M8 ×1.25 6.807.19 6.65M10 ×1.09.009.358.92W17/8-4.541.5043.2940.4013/4-539.0041.1538.9513/8-1232.5033.3532.63 M9 ×1.257.808.197.65M10 ×1.258.759.198.65W2-4.544.5046.4643.572-4.545.0047.1344.6911/2-1236.0036.7335.81 M10 ×1.58.509.038.38M11 ×1.010.0010.359.92M11 ×1.59.5010.039.38M12 ×0.7511.2511.5111.19M12 ×1.7510.2010.8610.11M12 ×1.011.0011.3510.92M14 ×2.012.0012.7011.83M12 ×1.2510.7511.1910.65M16 ×2.014.0014.7013.83M12 ×1.510.5011.0310.38M18 ×2.515.5016.3815.29M14 ×1.013.0013.3512.9260%100%60%100%60%100% M20 ×2.517.5018.3817.29M14 ×1.2512.7513.1912.65W1/16-60 1.40 1.42 1.32Nr.1-64 1.70 1.73 1.64Nr.0-80 1.40 1.42 1.35 M22 ×2.519.5020.3819.29M14 ×1.512.5013.0312.38W3/32-48 2.10 2.18 2.04Nr.2-56 2.00 2.04 1.94Nr.1-72 1.70 1.74 1.66 M24 ×3.021.0022.0520.75M15 ×1.014.0014.3513.92W1/8-40 2.85 2.93 2.77Nr.3-48 2.25 2.34 2.23Nr.2-64 2.00 2.06 1.97 M27 ×3.024.0025.0523.75M15 ×1.2513.7514.1913.65W5/32-32 3.55 3.66 3.46Nr.4-40 2.55 2.64 2.50Nr.3-56 2.30 2.37 2.27 M30 ×3.526.5027.7326.21M15 ×1.513.5014.0313.38W3/16-24 4.25 4.36 4.08Nr.5-40 2.90 2.97 2.83Nr.4-48 2.60 2.67 2.56 M33 ×3.529.5030.7329.21M16 ×1.015.0015.3514.92W7/32-24 5.05 5.15 4.88Nr.6-32 3.15 3.25 3.08Nr.5-44 2.90 2.99 2.86 M36 ×4.032.0033.4031.67M16 ×1.2514.7515.1914.65W1/4-20 5.75 5.86 5.54Nr.8-32 3.80 3.91 3.74Nr.6-40 3.20 3.30 3.16 M39 ×4.035.0036.4034.67M16 ×1.514.5015.0314.38W5/16-187.307.407.03Nr.10-24 4.35 4.48 4.25Nr.8-36 3.85 3.94 3.78 M42 ×4.537.5039.0837.13M18 ×1.017.0017.3516.92W3/8-168.808.928.51Nr.12-24 5.00 5.14 4.91Nr.10-32 4.45 4.57 4.40 M45 ×4.540.5042.0840.13M18 ×1.2516.7517.1916.65W7/16-1410.3010.429.951/4-20 5.75 5.94 5.66Nr.12-28 5.05 5.19 4.99 M48 ×5.043.0044.7542.59M18 ×1.516.5017.0316.38W1/2-1211.7511.8911.345/16-187.307.487.171/4-28 5.95 6.06 5.86 M52 ×5.047.0048.7546×59M18 ×2.016.0016.7015.833/8-168.809.018.675/16-247.407.597.36 M56 ×5.550.5052.4350.05M20 ×1.019.0019.3518.927/16-1410.3010.5210.133/8-249.009.188.95 M60 ×5.554.5056.4354.05M20 ×1.2518.7519.1918.651/2-1311.8012.0711.641/2-2012.1012.2912.01 M64 ×658.0060.1057.50M20 ×1.518.5019.0318.38M68 ×662.0064.1061.50M20 ×2.018.0018.7017.83PT(Rc)PS(Pp)PF(G)M72 ×666.0068.1065.50M22 ×1.021.0021.3520.92下孔径下孔径下孔径M76 ×670.0072.1069.50M22 ×1.2520.7521.1920.651/16-28 6.30 6.50 6.70英时英时//公 对照表无屑丝攻美制细牙螺纹无屑丝攻美制细牙螺纹((UNFUNF))规格规格规格规格公制粗牙螺纹公制粗牙螺纹((M)下孔径(%)下孔径规格公制细牙螺纹公制细牙螺纹((M)下孔径下孔径(%)无屑丝攻英制粗牙螺纹无屑丝攻英制粗牙螺纹((W)规格规格英制管牙螺纹无屑丝攻美制粗牙螺纹无屑丝攻美制粗牙螺纹((UNCUNC))针车牙螺纹针车牙螺纹((SMSM))英制粗牙螺纹英制粗牙螺纹((W)下孔径下孔径(%)规格美制细牙螺纹美制细牙螺纹((UNFUNF))下孔径下孔径(%)规格螺丝攻下孔径对照表下孔径下孔径(%)下孔径下孔径(%)下孔径下孔径(%)美制粗牙螺纹美制粗牙螺纹((UNCUNC))下孔径下孔径(%)M22 ×1.520.5021.0320.381/8-288.308.608.70M22 ×2.020.0020.0719.831/4-1911.0011.5011.7060%100%M24 ×1.023.0023.3522.923/8-1914.5015.0015.25SM1/16-80 1.30 1.34 1.181/16M24 ×1.2522.7523.1922.651/2-1418.1018.5019.00SM5/64-64 1.60 1.68 1.473/32M24 ×1.522.5023.0322.385/8-1421.00SM3/32-100 2.15 2.18 2.051/860%100%M24 ×2.022.0022.7021.833/4-1423.5024.0024.50SM3/32-56 1.90 2.03 1.795/32M1×0.250.900.920.86M25 ×1.024.0024.1923.927/8-1428.00SM1/8-44 2.55 2.73 2.4311/64M1.1×0.25 1.00 1.020.96M25 ×1.523.5024.0323.381-1129.6030.2530.50SM1/8-40 2.50 2.68 2.353/16M1.2×0.25 1.10 1.12 1.06M25 ×2.023.0023.7022.8311/8-1135.50SM9/64-40 2.90 3.08 2.757.32M1.4×0.3 1.25 1.30 1.24M26 ×1.524.5025.0324.3811/4-1138.1039.0039.50SM11/64-40 3.70 3.87 3.5415/64M1.6×0.35 1.45 1.49 1.41M27 ×1.026.0026.3525.9211/2-1144.0044.9045.00SM3/16-32 3.95 4.14 3.731/4M1.7×0.35 1.55 1.59 1.51M27 ×1.525.5026.0325.3813/4-1151.00SM3/16-28 3.80 4.06 3.589/32M1.8×0.35 1.65 1.69 1.61M27 ×2.025.0025.7024.832-1155.6056.6057.00SM7/32-32 4.70 4.94 4.535/16M2×0.4 1.80 1.87 1.78M28 ×1.526.5027.0326.38SM15/64-28 5.00 5.25 4.773/8M2.2×0.45 2.00 2.05 1.96M28 ×2026.0026.7025.83SM1/4-40 5.70 5.86 5.537/16M2.3×0.4 2.10 2.17 2.08M30 ×1.029.0029.3528.92SM1/4-28 5.40 5.64 5.171/2M2.5×0.45 2.30 2.35 2.26M30 ×1.528.5029.0328.38SM1/4-24 5.25 5.53 4.989/16M2.6×0.45 2.40 2.45 2.36M30 ×2.028.0028.7027.83NPT SM9/32-28 6.20 6.44 5.975/8M3×0.5 2.75 2.84 2.73M32 ×1.530.5031.0330.38下孔径SM9/32-20 5.80 6.15 5.4911/16M3.5×0.6 3.20 3.31 3.18M33 ×1.531.5032.0331.381/16-27 6.20SM5/16-287.007.23 6.673/4M4×0.7 3.65 3.77 3.62M33 ×2.031.0031.7030.831/8-278.50SM5/16-24 6.857.11 6.567/8M4.5×0.75 4.15 4.26 4.09M33 ×3.030.0031.5029.751/4-1811.00SM5/16-18 6.50 6.84 6.101M5×0.8 4.60 4.74 4.57M35 ×1.533.5034.0333.383/8-1814.50SM3/8-288.558.828.3511/8M6×1.0 5.50 5.68 5.46M36 ×1.534.5035.0334.381/2-1418.00SM3/8-188.058.437.6911/4M7×1.0 6.50 6.68 6.46M36 ×2.034.0034.7033.833/4-1423.00SM7/16-2810.1510.419.9313/8M8×1.257.357.597.32M36 ×3.033.0034.0532.751-111/２29.00SM7/16-169.409.889.0511/2M9×1.258.408.598.32M38 ×1.536.5037.0336.3811/4-111/２38.00SM1/2-2811.7511.9911.5215/8M10×1.59.259.519.19M39 ×1.537.5038.0337.3811/2-111/２44.00SM1/2-2011.3511.7111.0513/4M12×1.7511.1011.4311.05M39 ×2.037.0037.7036.832-111/３56.00SM1/2-1210.4011.059.9517/8M39 ×3.036.0037.0535.7521/265.892M40 ×1.538.5039.0338.38M40 ×2.038.0038.7037.83M40 ×3.037.0038.0536.75M42 ×1.540.5041.0340.3860%100%M42 ×2.040.0040.7039.83Pg7 -2011.4011.6911.08M42 ×3.039.0040.0538.75Pg9 -1814.0014.3313.66M42 ×4.038.0040.7037.66Pg11 -1817.2517.7317.06M45 ×1.543.5044.0343.38Pg13.5 -1819.0019.5318.86M45 ×2.043.0043.7042.83Pg16 -1821.2521.6320.96M45 ×3.042.0043.0541.75Pg21 -1626×7527.2426.48M45 ×4.041.0042.4040.67Pg29 -1635.5035.9435.18M48 ×2.046.0046.7045.83Pg36 -1645.5045.9445.18M48 ×3.045.0046.0544.75Pg42 -1652.5052.9452.08M48 ×4.044.0045.4043.67Pg48 -1657.5058.2457.48M50 ×1.548.5049.0348.38M50 ×2.048.0048.7047.83M50 ×3.047.0048.0546.75M52 ×1.550.5051.0350.38M52 ×2.050.0050.7049.83M52 ×3.049.0050.0548.7567.4622.225025.400028.575050.800047.625041.275044.450038.100034.925031.750014.287515.875017.462519.0500美制管牙螺纹无屑丝攻公制粗牙螺纹无屑丝攻公制粗牙螺纹((M )Pg Pg钢管牙钢管牙规格规格规格下孔径下孔径(%)56.4044.45下孔径下孔径(%)规格下孔径下孔径(%)12.70004.36563.96883.17501.587538.1029.4023.4018.1514.7011.158.756.35下孔径NPS 11.112512.70009.52507.93757.14386.35005.95315.55635厘7厘半1分1分2厘半--1分半1分7厘半2.3813--2分2分2厘半2分半3分3分半4分4分半5分5分半6分7分1吋1吋1分1吋2分1吋3分2吋1吋4分1吋5分1吋6分1吋7分。
螺纹下孔径表(无屑丝攻用)
2
1.78 ~ 1.82(100~80)
4
1.81 ~ 1.85 (100~75)
2.3×0.4
2
2.08 ~ 2.12(100~80)
4
2.11 ~ 2.15 (100~75)
2.5×0.45
2
2.25 ~ 2.29(100~80)
4
2.28 ~ 2.33 (100~75)
2.6×0.45
7/16 -14
7
10.11 ~10.25 (100~80)
5
10.08 ~10.19 (100~85)
1/2 -13
8
10.62 ~11.78 (100~80)
6
11.60 ~11.68 (100~90)
9/16 -12
10
13.14 ~13.27 (100~85)
8
13.11 ~13.24 (100~85)
6
3.65 ~ 3.70 (100~85)
5×0.8
4
4.57 ~ 4.62(100~85)
6
4.59 ~ 4.66 (100~80)
6×1
4
5.45 ~ 5.51(100~85)
7
5.48 ~ 5.57 (100~80)
7×1
4
6.45 ~ 6.51(100~85)
7
6.48 ~ 6.57 (100~80)
16.57 ~16.67 (100~90)
11
16.63 ~16.78 (100~85)
18×1.5
6
17.17 ~17.23 (100~90)
10
17.22 ~17.31 (100~85)
20×2.5
各种螺纹详细参数和钻孔直径对照表
螺纹下孔径表公制粗牙螺纹 JIS B 0209-1982(單位：mm)註(1)以下等級：5H、以上等級：6H(2)基於JIS B 0209-1982標準螺纹下孔径表螺纹下孔径表註(1)等級：6H(2)基於JIS B 0211-1982標準螺纹下孔径表美制粗牙螺纹 (單位：mm)螺纹下孔径表美制細牙螺纹 (單位：mm)螺纹下孔径表英制粗牙螺纹(單位：mm)螺纹下孔径表英制管用螺纹 (單位：mm)螺纹下孔径表美制斜行管用螺纹 (NPT‧NPS) (單位：mm)上述钻头直径來源於美制管用螺纹ANSI／ASME —1983 Pipe Threads, General Purpose (Inch)標準。
螺纹下孔径表美制管用耐密斜行螺纹(NPTF‧NPSF) (單位：mm)上述钻头直径來源於美制管用耐密斜行螺纹ANSI —1957 Dryseal Pipe Threads (Inch)標準。
螺纹下孔径表(無屑絲攻用)公制螺纹(NRT) (單位：mm)螺纹下孔径表(無屑絲攻用)美制粗牙螺纹(NRT) (單位：mm)螺纹下孔径表(無屑絲攻用)美制細牙螺纹(NRT) (單位：mm)英制管用平行螺纹(NRT) (單位：mm)螺纹下孔径表(無屑絲攻用)公制螺纹(HRT) (單位：mm)螺纹下孔径表(護套螺纹用)公制粗牙螺纹 HL-NRT (單位：mm)螺纹下孔径表(護套螺纹用)公制粗牙螺纹 (單位：mm)公制細牙螺纹 (單位：mm)螺纹下孔径表(護套螺纹用)美制粗牙螺纹 (單位：mm)各 種 換 算 表山數節距換算表管用螺絲基準寸法(mm)。
螺纹孔径对照表
英制粗牙(W)
規格 W1/16 -60 W3/32 -48 W1/8 -40 W5/32 -32 W3/16 -24 W7/32 -24 W1/4 -20 W5/16 -18 W3/8 -16 W7/16 -14 W1/2 -12 W9/16 -12 W5/8 -11 W3/4 -10 W7/8 -9 W1 -8 W1 1/8 -7 W1 1/4 -7 W1 3/8 -6 W1 1/2 -6 W1 5/8 -5 W1 3/4 -5 W1 7/8 -4.5 W2 -4.5 規 W1/16 W3/32 W1/8 W5/32 W3/16 W7/32 W1/4 W5/16 W3/8 W7/16 W1/2 格 -60 -48 -40 -32 -24 -24 -20 -18 -16 -14 -12 下孔徑 1.20 1.80 2.60 3.10 3.60 4.50 5.10 6.50 7.90 9.30 10.50 12.00 13.50 16.50 19.25 22.00 24.75 27.75 30.20 33.50 35.50 38.50 41.50 44.50 下孔徑 1.40 2.10 2.85 3.55 4.25 5.05 5.75 7.30 8.80 10.30 11.75 下孔徑(%) 60% 100% 1.26 1.05 1.97 1.70 2.69 2.36 3.36 2.95 3.95 3.41 4.74 4.20 5.37 4.72 6.85 6.13 8.31 7.49 9.72 8.79 11.07 9.99 12.66 11.58 14.10 12.92 17.10 15.80 20.06 18.61 22.96 21.33 25.79 23.93 28.96 27.10 31.67 29.50 34.85 32.68 37.37 34.77 40.55 37.94 43.29 40.40 46.46 43.57 下孔徑(%) 60% 100% 1.42 1.32 2.18 2.04 2.93 2.77 3.66 3.46 4.36 4.08 5.15 4.88 5.86 5.54 7.40 7.03 8.92 8.51 10.42 9.95 11.89 11.34 規格 Nr.1 -64 Nr.2 -56 Nr.3 -48 Nr.4 -40 Nr.5 -40 Nr.6 -32 Nr.8 -32 Nr.10 -24 Nr.12 -24 1/4 -20 5/16 -18 3/8 -16 7/16 -14 1/2 -13 9/16 -12 5/8 -11 3/4 -10 7/8 -9 1 -8 1 1/4 -7 1 3/8 -6 1 1/2 -6 1 3/4 -5 2 - 4.5 規 格
最全面的螺纹加工底孔径对照表
最全面的螺纹加工底孔径对照表本文件包含内容公制粗螺纹2级牙底孔径对照表公制细螺纹2级牙底孔径对照表美制粗螺纹2级牙底孔径对照表美制细螺纹2级牙底孔径对照表公制迫牙丝攻钻孔径对照表美制迫牙丝攻钻孔径对照表美制特细螺纹2级牙底孔径对照表英制电器螺纹底孔径对照表英制管螺纹(PS）底孔径对照表英制管螺纹(PT）底孔径对照表美制管螺纹(NPT、NPS）底孔径对照表英制螺纹(UNEF）底孔径对照表公制螺纹（滚造径）底孔径对照表针车用其所长螺纹（滚造径）底孔径对照表英制圆柱管螺纹(55度）加工一览表英制锥管螺纹(55度）加工一览表布锥管螺纹加工一览表美制UNC、UNF螺纹参数表惠氏BSW、BSF螺纹参数表公制螺纹特殊材质工件加工底孔径对照表非密封管螺纹底孔径对照表英制锥管螺纹和英制锥螺纹攻丝前钻底孔的钻头直径日标英制锥度管螺纹底孔径对照表英制平行管螺纹底孔径对照表美制管用螺纹（使用/不使用铰刀）底孔径对照表圆锥管螺纹（新旧国标、日标）底孔径对照表圆柱管螺纹（新旧国标、日标）底孔径对照表布锥管螺纹（新旧国标、日标）底孔径对照表公制粗牙（铜、铁、不锈钢、铝质工件）底孔径对照表公制细牙（铜、铁、不锈钢、铝质工件）底孔径对照表60度圆锥管螺纹（钻/镗孔）底孔径对照表60度圆柱管螺纹（钻/镗孔）底孔径对照表公制细螺纹美制细螺纹全球最大中文电子商务平台阿里巴巴6年诚信通会员单位江都市华宇刃具厂竭诚为您服务，企业官网链接：。
G 英制圆柱管螺纹（55°）加工一览表小径：d1=d-1.2807tZG 英制锥管螺纹（55°）加工一览表小径：d1=d-1.2807t注意：底孔尺寸均为加工螺纹孔时专用尺寸。
深度尺寸均为加工螺纹孔时孔深度尺寸。
（规定为15倍螺距）Z 圆锥管螺纹（布锥管螺纹）（60°）小径：d1=d-1.6t美制螺纹（UNC、UNF）参数表（60°）小径：1注意：in为英寸符号，一英寸等于25.4毫米。
最全的螺纹孔径对照表
最全的螺纹孔径对照表在机械加工和制造领域，螺纹孔径的准确测量和选择是至关重要的。
螺纹孔的尺寸规格繁多，为了方便工程技术人员在设计、加工和装配过程中能够快速准确地找到所需的螺纹孔径数据，我们整理了这份最全的螺纹孔径对照表。
首先，让我们来了解一下什么是螺纹孔径。
螺纹孔径指的是在螺纹孔中，除去螺纹部分的内孔直径。
它是决定螺纹连接强度、密封性以及装配精度的重要参数。
常见的螺纹标准有公制螺纹和英制螺纹。
公制螺纹以毫米为单位，英制螺纹则以英寸为单位。
以下是公制螺纹孔径的对照表：M1 螺纹的孔径约为 075mm，M2 螺纹的孔径约为 16mm，M3 螺纹的孔径约为 25mm，M4 螺纹的孔径约为 33mm，M5 螺纹的孔径约为42mm，M6 螺纹的孔径约为 5mm，M8 螺纹的孔径约为 68mm，M10螺纹的孔径约为 85mm，M12 螺纹的孔径约为 102mm，M14 螺纹的孔径约为 12mm，M16 螺纹的孔径约为 14mm，M18 螺纹的孔径约为155mm，M20 螺纹的孔径约为175mm，M22 螺纹的孔径约为195mm，M24 螺纹的孔径约为 21mm，M27 螺纹的孔径约为 24mm，M30 螺纹的孔径约为 265mm，M33 螺纹的孔径约为 295mm，M36 螺纹的孔径约为 32mm，M39 螺纹的孔径约为 35mm，M42 螺纹的孔径约为375mm，M45 螺纹的孔径约为 405mm，M48 螺纹的孔径约为 43mm，M52 螺纹的孔径约为 475mm，M56 螺纹的孔径约为 505mm，M60 螺纹的孔径约为 545mm，M64 螺纹的孔径约为 585mm，M68 螺纹的孔径约为 62mm，M72 螺纹的孔径约为 66mm，M76 螺纹的孔径约为70mm，M80 螺纹的孔径约为 74mm，M85 螺纹的孔径约为 79mm，M90 螺纹的孔径约为 84mm，M95 螺纹的孔径约为 89mm，M100 螺纹的孔径约为 94mm。
最全螺纹底孔查询表
NPT
不用铰刀时
37.69
NPS
38.1
螺纹(PS,PF,PT)
钻孔径
最大
最小
57.296 56.656
针车用螺纹
规格
标准径
最大
最小
SM1/16 -80 1.25 1.281 1.211
美制特殊螺纹(UNS)
规格（2B内螺纹) 螺纹外径
钻孔径
最大
最小
1/4-36 UNS 2B 6.35 5.7404 5.588
规格
标准径
2级牙钻孔径 最大 最小
1/4 -32 5.6 5.689 5.487
牙 套 螺 纹攻 用
规格