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1、英制螺纹尺寸公差表 单位：毫米 规格代号 系列 代号 等 级 螺距 外螺纹 内螺纹 名义直径 每英寸牙数外径 中径 内径 小径 中径 大径 1 0.06080 （0#80）UNF 2 0.3175 1.5113 0.081281.30556 0.04572 1.122681.1811 +0.124461.3182 +0.058421.524 3 0.3175 1.5240 0.08128 1.3182 0.033021.135381.1811 +0.124461.3182 +0.043181.524 2 0.07364 （1#64）UNC 2 0.3968751.83896 0.096521.
2、58242 0.0508 1.35128 1.42494 +0.157481.59766 +0.066041.8542 3 0.3968751.8542 0.096521.59766 0.03811.36652 1.42494 +0.157481.59766 +0.048261.8542 3 0.07372 （1#72）UNF 2 0.3527771.83896 0.0889 1.61036 0.048261.40716 1.4732 +0.1397 1.6256 +0.06351.8542 3 0.3527771.8542 0.0889 1.6256 0.035561.4224 1.4732
3、 +0.1397 1.6256 +0.048261.8542 4 0.08656 （2#56）UNC 2 0.4535712.16916 0.104141.87452 0.053341.6129 1.69418 +0.17781.88976 +0.071122.1844 3 0.4535712.1844 0.104141.88976 0.040641.62814 1.69418 +0.17781.88976 +0.053342.1844 5 0.08664 （2#64）UNF 2 0.3968752.16916 0.096521.91262 0.0508 1.68148 1.75514 +0.
4、15748 1.92786 +0.068582.1844 3 0.3968752.1844 0.096521.92786 0.0381 1.69672 1.75514 +0.15748 1.92786 +0.0508 2.1844 6 0.09948 （3#48）UNC 2 0.5291662.49682 0.11432.15392 0.058421.84658 1.94056 +0.20574 2.1717 +0.076202.5146 3 0.5291662.5146 0.11432.1717 0.043181.86436 1.94056 +0.20574 2.1717 +0.055882
5、.5146 7 0.09956 （3#56）UNF 2 0.4535712.49682 0.104142.20218 0.055881.94056 2.02438 +0.17272 2.21996 +0.071122.5146 3 0.4535712.5146 0.104142.21996 0.040641.95834 2.02438 +0.17272 2.21996 +0.053342.5146 8 0.11240 （4#40）UNC 2 0.635 2.82448 0.129542.413 0.0635 2.0447 2.15646 +0.22862.43332 +0.083822.844
6、8 3 0.635 2.8448 0.129542.43332 0.048262.06502 2.15646 +0.22862.43332 +0.060962.8448 9 0.11248 （4#48）UNF 2 0.5291662.82702 0.11432.48412 0.060962.17678 2.27076 +0.18796 2.5019 +0.078742.8448 3 0.5291662.8448 0.11432.5019 0.045722.19456 2.27076 +0.18796 2.5019 +0.058422.8448 10 0.12540 （5#40）UNC 2 0.
7、635 3.15468 0.129542.7432 0.066042.3749 2.48666 +0.21082 2.76352 +0.083823.175 3 0.635 3.175 0.129542.76352 0.048262.39522 2.48666 +0.21082 2.76352 +0.06353.175 11 0.12544 （5#44）UNF 2 0.5772733.15722 0.121922.7813 0.06352.44856 2.55016 +0.19052.79908 +0.081283.175 3 0.5772733.175 0.121922.79908 0.04
8、8262.46634 2.55016 +0.19052.79908 +0.060963.175 12 0.13832 （6#32）UNC 2 0.79375 3.48488 0.15242.96926 0.071122.51206 2.6416 +0.2542.98958 +0.093983.5052 3 0.79375 3.5052 0.15242.98958 0.053342.53238 2.6416 +0.2542.98958 +0.068583.5052 13 0.13840 （6#40）UNF 2 0.635 3.48488 0.129543.0734 0.066042.7051 2
9、.8194 +0.20323.09372 +0.086363.5052 3 0.635 3.5052 0.129543.09372 0.05082.72542 2.8194 +0.193043.09372 +0.06353.5052 序 号 规格代号 系列 代号 等 级 螺距 外螺纹 内螺纹 名义直径 每英寸牙数外径 中径 内径 小径 中径 大径 14 0.16432 （8#32）UNC 2 0.793754.14274 0.15243.62712 0.073663.16992 3.302 +0.22863.64998 +0.096524.1656 3 0.793754.1656 0.1524
10、3.64998 0.055883.19278 3.302 +0.226063.64998 +0.071124.1656 15 0.16436 （8#36）UNF 2 0.705554.14528 0.13973.68808 0.071123.27914 3.4036 +0.20323.7084 +0.091444.1656 3 0.705554.1656 0.13973.7084 0.053343.29946 3.4036 +0.19304 3.7084 +0.068584.1656 16 0.19024 （10#24）UNC 2 1.058334.8006 0.182884.11226 0.
11、083823.50266 3.683 +0.27944.13766 +0.109224.826 3 1.058334.826 0.18288 4.13766 0.06353.52806 3.683 +0.26674.13766 +0.081284.826 17 0.19032（10#32）UNF 2 0.793754.80314 0.15244.28752 0.07623.83032 3.9624 +0.20324.31038 +0.099064.826 3 0.793754.826 0.1524 4.31038 0.058423.85318 3.9624 +0.20574 4.31038 +
12、0.073664.826 18 0.21624 UNC 2 1.058335.461 0.18288 4.77266 0.086364.16306 4.3434 +0.2544.79806 +0.111765.4864 3 1.058335.4864 0.182884.79806 0.066044.18846 4.3434 +0.24638 4.79806 +0.83825.4864 19 0.21628 UNF 2 0.907145.461 0.1651 4.87172 0.081284.34848 4.4958 +0.22864.89712 +0.106685.4864 3 0.90714
13、5.4864 0.16514.89712 0.060964.37388 4.4958 +0.22098 4.89712 +0.078745.4864 20 0.21632 UNEF 2 0.793755.46354 0.15244.94792 0.078744.49072 4.6228 +0.20324.97078 +0.104145.4864 3 0.793755.4864 0.15244.97078 0.060964.51358 4.6228 +0.19054.97078 +0.078745.4864 21 0.25020 1/420 UNC 1 1.27 6.32206 0.309885
14、.49656 0.142244.76504 4.9784 +0.27945.5245 +0.185426.35 2 1.27 6.32206 0.205745.49656 0.093984.76504 4.9784 +0.27945.5245 +0.124466.35 3 1.27 6.35 0.205745.5245 0.071124.79298 4.9784 +0.27178 5.5245 +0.091446.35 22 0.25028 1/428UNF 1 0.907146.3246 0.248925.73532 0.1275.21208 5.3594 +0.22865.76072 +0
15、.16516.35 2 0.907146.3246 0.16515.73532 0.083825.21208 5.3594 +0.22865.76072 +0.109226.35 3 0.907146.35 0.16515.76072 0.06355.23748 5.3594 +0.20325.76072 +0.081286.35 23 0.25032 1/432UNEF 2 0.793756.3246 0.15245.80898 0.81285.35178 5.4864 +0.20325.83438 +0.106686.35 3 0.793756.35 0.15245.83438 0.60965.
