美制统一螺纹 UNC-UNF 完整版尺寸对照表（ASME B1.160°牙型）

美制统一螺纹UNC/UNF完整版尺寸对照表（ASMEB1.1，60°牙型）说明：代号：UNC粗牙、UNF细牙；TPI=每英寸牙数；1英寸=25.4mm牙高（基本工作高度）h=0.5413×P；理论原始三角高度H=0.8660×P大径(外径)、中径、小径为基本尺寸（in/mm）；钻孔直径：内螺纹2B级、75%牙高常用钻头（塑性钢件参考）#0~#12为小规格编号螺纹；1/4"及以上英寸规格一、基础计算公式螺距P(工作牙高h=0.5413P内螺纹底孔经验：塑性材料≈大径−P；脆性材料≈大径−1.0825P二、完整参数总表螺纹规格系列TPI牙数螺距P(mm)工作牙高h(mm)大径(外径)in｜mm中径in｜mm小径in｜mm推荐攻丝底孔(mm)#0-80UNF800.31750.17190.0600｜1.5240.0519｜1.3180.0447｜1.1351.25#1-64UNC640.39690.21480.0730｜1.8540.0629｜1.5980.0538｜1.3671.55#1-72UNF720.35280.19100.0730｜1.8540.0640｜1.6260.0560｜1.4221.60#2-56UNC560.45360.24550.0860｜2.1840.0744｜1.8900.0641｜1.6281.80#2-64UNF640.39690.21480.0860｜2.1840.0759｜1.9280.0668｜1.6971.85#3-48UNC480.52920.28650.0990｜2.5150.0855｜2.1720.0734｜1.8642.10#3-56UNF560.45360.24550.0990｜2.5150.0874｜2.2200.0771｜1.9582.15#4-40UNC400.63500.34310.1120｜2.8450.0985｜2.5020.0822｜2.0882.30#4-48UNF480.52920.28650.1120｜2.8450.0986｜2.5040.0864｜2.1952.40#5-40UNC400.63500.34310.1250｜3.1750.1115｜2.8320.0952｜2.4182.60#5-44UNF440.57730.31150.1250｜3.1750.1126｜2.8600.0985｜2.5022.65#6-32UNC320.79380.42970.1380｜3.5050.1177｜2.9900.0974｜2.4742.80#6-40UNF400.63500.34310.1380｜3.5050.1245｜3.1620.1082｜2.7482.90#8-32UNC320.79380.42970.1640｜4.1660.1437｜3.6500.1234｜3.1343.40#8-36UNF360.70560.38290.1640｜4.1660.1460｜3.7080.1279｜3.2493.50#10-24UNC241.05830.57200.1900｜4.8260.1629｜4.1380.1359｜3.4523.80#10-32UNF320.79380.42970.1900｜4.8260.1697｜4.3100.1491｜3.7873.90#12-24UNC241.05830.57200.2160｜5.4860.1889｜4.7980.1619｜4.1124.30#12-28UNF280.90710.49100.2160｜5.4860.1928｜4.8970.1696｜4.3084.401/4-20UNC201.27000.68770.2500｜6.3500.2175｜5.5250.1887｜4.7935.101/4-28UNF280.90710.49100.2500｜6.3500.2268｜5.7610.2068｜5.2535.505/16-18UNC181.41110.76380.3125｜7.9380.2764｜7.0210.2443｜6.2056.505/16-24UNF241.05830.57200.3125｜7.9380.2854｜7.2490.2614｜6.6406.903/8-16UNC161.58750.85930.3750｜9.5250.3344｜8.4940.2938｜7.4638.003/8-24UNF241.05830.57200.3750｜9.5250.3479｜8.8370.3239｜8.2278.507/16-14UNC141.81430.98210.4375｜11.1130.3911｜9.9340.3447｜8.7559.407/16-20UNF201.27000.68770.4375｜11.1130.4050｜10.2870.3762｜9.5559.901/2-13UNC131.95381.05770.5000｜12.7000.4500｜11.4300.4084｜10.37310.801/2-20UNF201.27000.68770.5000｜12.7000.4675｜11.8750.4387｜11.14311.509/16-12UNC122.11671.14580.5625｜14.2880.5084｜12.9130.4613｜11.71712.409/16-18UNF181.41110.76380.5625｜14.2880.5264｜13.3710.4943｜12.55512.905/8-11UNC112.30911.24990.6250｜15.8750.5660｜14.3760.5166｜13.12213.605/8-18UNF181.41110.76380.6250｜15.8750.5889｜14.9580.5568｜14.14314.503/4-10UNC102.54001.37470.7500｜19.0500.6850｜17.3990.6309｜16.02516.603/4-16UNF161.58750.85930.7500｜19.0500.7094｜18.0190.6688｜16.98817.507/8-9UNC92.82221.52560.8750｜22.2250.8028｜20.3910.7443｜18.90519.507/8-14UNF141.81430.98210.8750｜22.2250.8261｜20.9830.7799｜19.80920.301"-8UNC83.17501.71561.0000｜25.4000.9188｜23.3380.8557｜21.73522.201"-12UNF122.11671.14581.0000｜25.4000.9459｜24.0260.8917｜22.64923.00三、重要使用备注区分美制统一螺纹UN/UNC/UNF（60°）≠英制惠氏BSW/BSF（55°），两者不能