全系列螺纹钻孔直径对照表

螺纹钻孔直径对照表

公制螺纹公制细牙螺纹55°圆柱内螺纹（Rp)55°圆锥内螺纹（Rc)55°非密封圆柱内螺纹（G)

规格钻孔直径规格钻孔直径规格钻孔直径规格钻孔直径规格钻孔直径标准直径最大最小标准直径最大最小标准直径最大最小标准直径最大最小标准直径最大最小

M10.750.7850.729M1*0.20.80.8210.7831/16-28 6.5 6.632 6.491/16-28 6.3 6.384 6.2441/16-28 6.7 6.843 6.561 M2 1.6 1.679 1.567M2*0.25 1.725 1.785 1.7291/8-288.58.6378.4951/8-288.38.3888.2491/8-288.78.8488.566 M3 2.5 2.599 2.459M3*0.35 2.7 2.721 2.6211/4-1911.411.54911.3411/4-191111.17410.9621/4-1911.711.8911.445 M4 3.3 3.422 3.242M4*0.5 3.5 3.599 3.4593/8-1914.915.04514.8463/8-1914.514.65814.4483/8-1915.215.39514.95 M5 4.2 4.334 4.134M5*0.5 4.5 4.599 4.4591/2-1418.618.77318.4891/2-1418.118.26317.9791/2-141919.17218.631 M65 5.153 4.917M6*0.75 5.3 5.378 5.1883/4-142424.25923.9753/4-1423.523.66323.3785/8-142121.12820.587 M76 6.153 5.917M7*0.75 6.3 6.378 6.1881-1130.230.47230.111-1129.629.82229.4593/4-1424.524.65824.117 M8 6.8 6.912 6.647M8*177.153 6.91711/4-1138.839.13338.77111/4-1138.238.33937.9767/8-1428.228.41827.877 M108.58.6768.376M8*0.757.37.3787.18811/2-1144.745.02644.66411/2-114444.23243.8691-1130.630.93130.291 M1210.2510.44110.106M10*1.258.88.9128.6472-1156.556.83756.4752-1155.655.84455.41211/8-1135.235.57934.939 M141212.2111.835M10*199.1538.91711/4-1139.239.59238.952 M161414.2113.835M10*0.759.39.3789.18811/2-114545.48544.845 M1815.515.74415.294M12*1.510.510.67610.37613/4-115151.42850.788 M2017.517.74417.294M12*1.2510.810.91210.6472-115757.29656.656 M2219.519.74419.294M12*11111.15310.917

M242121.25220.752M14*1.512.512.67612.376

M272424.25223.752M14*1.2512.812.91212.647

M3026.526.77126.211M14*11313.15312.917

M3329.529.77129.211M16*1.514.514.67614.376

M363232.2731.67M16*11515.15314.917

M393535.2734.67M18*21616.2115.835

M18*1.516.516.67616.376

M18*11717.15316.917

M20*21818.2117.835

M20*1.518.518.67618.376

M20*11919.15318.917

M22*22020.2119.835

M22*1.520.520.67620.376

M22*12121.15320.917

M24*22222.2121.835

M24*1.522.522.67622.376

M24*12323.15322.917

M27*22525.2124.835

M27*1.525.525.67625.376

M27*12626.15325.917

M30*32727.25226.752

M30*22828.2127.835

M30*1.528.528.67628.376

M30*12929.15328.917

M33*33030.25229.752

M33*23131.2130.835

M33*1.531.531.67631.376

M36*33333.25232.752

M36*23434.2133.835

M36*1.534.534.67634.376

M39**33636.25235.752

M39*23737.2136.835

M39*1.537.537.67637.376

螺纹钻孔直径对照表

60°圆锥内螺纹（NPT)60°圆柱内螺纹（NPSC)统一螺纹（UNF）统一螺纹（UNC）统一螺纹（UNEF）

规格钻孔直径规格钻孔直径规格钻孔直径规格钻孔直径规格钻孔直径标准直径最大最小标准直径最大最小标准直径最大最小标准直径最大最小标准直径最大最小

1/16-27 6.135 6.223 6.0461/8-278.488.88.636N0.0-80 1.25 1.305 1.18N0.1-64 1.5 1.585 1.435N0.12-32 4.722 4.816 4.628 1/8-278.488.5688.3931/4-1811.3511.4711.227N0.1-72 1.55 1.612 1.473N0.2-56 1.78 1.872 1.6941/4-32 5.585 5.679 5.491 1/4-1810.99611.12810.8643/8-1814.7714.914.656N0.2-64 1.85 1.912 1.755N0.3-48 2.14 2.04 1.945/16-327.1727.2677.079 3/8-1814.41614.54814.2841/2-1417.81318.16117.642N0.3-56 2.1 2.197 2.024N0.4-40 2.27 2.385 2.1563/8-328.768.8548.666 1/2-1417.81317.98317.6423/4-1423.12723.49523.297N0.4-48 2.4 2.458 2.271N0.5-40 2.593 2.698 2.4877/16-2810.23710.34310.13 3/4-1423.12723.29722.9571-11.529.05929.48929.266N0.5-44 2.7 2.74 2.551N0.6-32 2.77 2.899 2.651/2-2811.82411.9311.717 1-11.529.05929.26628.85111/4-11.537.78438.25237.991N0.6-40 2.9 3.022 2.817N0.8-32 3.418 3.528 3.3079/16-2413.26513.38813.142 11/4-11.537.78437.99137.57611/2-11.543.8544.32344.06N0.8-36 3.5 3.606 3.401N0.10-24 3.814 3.949 3.685/8-2414.8514.97514.729 11/2-11.543.8544.0643.6462-11.555.8656.36356.07N0.10-32 4.1 4.165 3.967N0.12-24 4.46 4.59 4.3411/16-2416.4416.56316.317 2-11.555.8656.0755.659N0.12-28 4.6 4.724 4.5031/4-20 5.121 5.267 4.9753/4-2017.82117.96717.675

1/4-28 5.5 5.588 5.3675/16-18 6.571 6.733 6.4113/16-2019.40919.55519.263

5/16-24 6.97.035 6.7913/8-167.9798.1587.87/8-2020.99621.1420.85

3/8-248.58.6368.3797/16-149.359.559.14915/16-2022.58522.73122.439

7/16-209.910.0339.7381/2-1310.79811.01310.5841-2024.17224.31824.026

1/2-2011.511.60711.3269/16-1212.913.08112.76111/16-1825.62225.78425.461

9/16-1812.913.08112.7615/8-1113.62213.86813.37611/8-1827.2127.37127.049

5/8-1814.514.68114.3483/4-1016.56616.83216.29913/16-1828.79728.95928.636

3/4-1617.517.67817.337/8-919.45819.74819.16911/4-1830.39430.55530.233

7/8-1420.520.67520.261-822.2822.59821.96315/16-1831.9732.13331.81

1-1223.323.57123.10911/8-724.99825.34924.64813/8-1833.55933.7233.398

11/8-1226.526.74626.28411/4-728.17328.52427.82317/16-1835.0735.23334.91

11/4-1229.629.92129.45913/8-632.831.1230.34311/2-1836.73436.89636.573

13/8-1232.833.09632.63411/2-633.90734.29533.51819/16-1838.1238.48338.16

11/2-353636.27135.80913/4-539.3839.8138.9515/8-1839.90940.0739.748

2-41/245.14445.59844.689111/16-1841.49741.65841.336