美制螺纹大全.docx

1、美制螺纹大全公称尺寸 和每英寸牙列代号最小曰 一取大最小曰1 取穴小径max最小曰 - 取A数 8-320.15710.16310.13990.14280.1248(0.164-32)3,99034.14273.55353.62713.1699 3.583.6110-240.18180.18900.15860.16190.1379(0.190-24)4.61774.80064.02844.11233,5027 4,074.1012-240,20780.21500.18450.18790.1639(0.216-24)5,27815.46104.68634.77274.1631 4.724.751

2、 /4-200.24080.24890.21270.21640,1876(0.250-20)6.11636.32215.40265.49664,7650 5,455.485/16-180.30260.31130.27120.27520.2431(0.3175-18)7.68607.90706.88856.99016.1747 6,946.983/8-160.36430.37370.32870.33310.29707.5438 8408.44(0.375-16)9.25329.49208.34908.4607刀 16-140,42580.43610.38500.38970.3485(0.4375

3、-14)UNC10.815311.07699.77909.89848,8519 9.839.871/2-130.48760.49850.44350.44850,4041(0.50-13)12.385012,661911,264911.391910.2641 11.3411.389/16-120.54950.56090.50160.50680.4587(0.5625-12)13.957314.246912.740612.872711.6510 12.8012,845/8-110.61130.62340.55890.56440.5119(0.625-11)15.527015,834414,1961

4、14.335813.0023 14.2714.323/4-100.73530.74820.67730.68320,6255(0.750-10)18.676619.004317,203417.353315.8877 17.2817.337/8-90.85920.87310.79460.80090.7368(0.875-9)21.823722,176720.182820.342918.7147 20.2720.321-80.98300.99800.91000.91680.844623,27(1.000-8)24.968225,349223,1140P3.P867P1.45P8 23.22大径极限螺

5、胚直径1 螺胚直径指滚丝前的尺寸，数值为依经验公式计算而得，在实践中需验证。2标记示例：1024UNC2A （或 019024UNC2A）、3/8-16UNC-2A （或 0.375-16UNC-2A）（注：表中上行斜体数值单位为英寸，下行为毫米）美制外螺纹（2A）常用规格极限尺寸表（粗牙） 中径极限美制外螺纹（2A）常用规格极限尺寸表（细牙）小径软钦噪备大娜中径极限5螺胚直径每英寸牙数列代号最小8-360.15770.16320.14240.14520.12913.653,67(0.164-36)4.00564.14533,61703.68813.279110-320.18310,18910

6、.16580.16880.1508(0.190-32)4.65074,80314,21134.28753.83034.244,2712-280.20850.21500.18860.19180.1712(0.216-28)5.29595.46104.79044.87174.34854.824,851/4-280.24250,24900.22250.22580.2052(0.250-28)6.15956,32465,65155.73535.21215.695.715/16-240.30420,31140,28060.28430.2603(0.3175-24)7.72677.90967.12727.

7、22126.61167.177,203/8-240.36670.37390.34300.34680.3228(0.375-24)9.31429.49718.71228.80878.19918,758.787/16-20UNF0,43620.39950.40370.3749(0.4375-20)10.873711.079510.147310.25409.522510.1910.231 /2-200.49060,49870.46190.46620.437411.7811.82(0.50-20)12.461212.667011,732311.841511.11009/16-180.55240.561

8、10.52050.52500.4929(0.5625-18)14.031014.251913.220713.335012,519713.2713.315/8-180.61490.62360,58280.58750.5554(0.625-18)15.618515,839414,803114.922514.107214.8514.893/4-160.73910.74850.70290.70790.6718(0.750-16)18.773119.011917.853717.980717.063717.9117.957/8-140.86310,87340.82160.82700.7858(0.875-

9、14)21,922722.184420.868621.005819,959320.9320.971-120.98680.99820.93820.94410.8960(1.000-12)25.064725,354323.830323.980122.758423.9023.951 螺胚直径指滚丝前的尺寸，数值为依经验公式计算而得，在实践中需验证。2.标记示例：1032UNF2A(或 0.190-32UNF-2A)、3/8-24UNF-2A(或 0.375-24UNF-2A)美制内螺纹(2B)常用规格极限尺寸表(粗牙)公称尺寸和螺纹系小径极限中径极限底孔直径每英寸牙数列代号最小曰I 取A最小最大大径

10、min最小曰 取A8-320.13000.13900.14370.14750.1640(0.164-32)UNC3.30203.53063.65003.74654.16563.403.5010-240.14500.15600.16290.16720.19003.753.90(0.190-24)3.68303.96244.13774.24694.826012-240.17100.18100,18890.19330,2160(0.216-24)4.34344.59744.79814.90985,4864 4.404,551/4-200,19600.20700.21750,22240,2500(0.

11、250-20)4.97845.25785.52455,64906,3500 5.055,205/16-180,25200.26500.27640,28170,3125(0.3175-18)6.40086.73107.02067.15527.9375 6.456.603/8-160,30700.32100.33440,34010,3750(0.375-16)7.79788.15348.49388.63859,5250 7.858,007/16-140.36000.37600.39110,39720,4375(0.4375-14)9,14409.55049.933910.088911.11259.

12、209,401/2-130.41700.43400,45000.45650,5000(0.50-13)10.591811.023611,430011.595112.700010.6510.909/16-120,47200.49000.50840,51520,5625(0.5625-12)11,988812,446012,913413.086114.287512.0512,305/8-110.52700.54600.56600,57320.6250(0,625-11)13.385813.868414,376414.559315.875013.4513,703/4-100.64200.66300.

13、68500.69270.7500(0.750-10)16,306816,840217,399017.594619.050016.4016.707/8-90,75500.77800.80280.81100.8750(0.875-9)19.177019.761220,391120.599422.225019.3019.601-80.86500.89000.91880.92761,0000(1.000-8)21.971022.606023,337523.561025.400022.1022,401底孔直径指攻丝前钻孔直径，铸铁、黄铜等较软料取小值，钢、青铜等较硬料取大值。2.标记示例：1024UNC

14、2B(或 0.190-24UNC-2B)、3/8-16UNC-2B(或 037516UNC2B)美制内螺纹(2B)常用规格极限尺寸表(细牙)公称尺寸和螺纹系小径极限中径极限底孔直径每英寸牙数列代号最小rsT取A最小曰亠 取穴大径min最小最8-360.13400.14200.14600.14960.1640(0.164-36)3.40363,60683.70843.79984.16563.453,6710-320.15600.16400.16970.17360.1900(0.190-32)UNF3.96244.16564,31044.40944.82604.004,2712-280.17700

15、,18600.19280,19700.2160(0.216-28)4.49584.72444,89715.00385.48644.554,851 /4-280.21100.22000,22680.23110.2500 U “6.3500 5.71(0,250-28)5.35945.58805.76075.86995/16-240.26700.27700,28540.29020,3125(0,3175-24)6.78187.03587,24927,37117.9375 6.857.203/8-240.33000.34000.34790.35280.3750(0,375-24)8.38208.63

16、608,83678.96119.5250 8.458.787/16-200.38300.39500.40500.41040.4375(0.4375-20)9.728210.033010.287010.424211,11259.8510.231/2-200.44600.45700,46750,47310,5000(0.50-20)11.328411.607811.874512.016712.700011.4011.829/16-180.50200.51500.52640.53230.5625(0,5625-18)12.750813.081013.370613.520414.287512.8513

17、.315/8-180.56500.57800,58890.59490,6250(0,625-18)14.351014.681214.958115.110515,8750 14,4514.893/4-160.68200.69600.70940.71590.7500(0.750-16)17.322817.678418.018818.183919.0500 17,4017.957/8-140.79800.81400.82860.83560.8750(0.875-14)20.269220.675621.046421.224222.225020.3520.971-120.91000.92800.9459

18、0.95351.0000(1,000-12)23.114023.571224.025924.218925.400023.9023.951底孔直径指攻丝前钻孔直径，铸铁、黄铜等较软料取小值，钢、青铜等较硬料取大值。2.标记示例：1032UNF2B(或 0.190-32UNF-2B)、3/8-24UNF-2B(或 0.375-24UNF-2B)美制螺纹标准大全外螺纹External内螺纹InternalNominalSine,Thr eads perInch,andSeries Desig nat ion级 别CI ass公差Allo wan ce大径 Major Diameter中径Pitch

19、Diameter小径UNR Minor Diam?Max( Re fj级 别CI ass小径Minor DiameterMaxMinMindMaxhMinMinMax0-80 UNF2A0.00050.05950.05630.05140.04960.04462 B0.04650.05143A00.060.05680.05190,05060.04513 B0.04650.05141-64 UNC2A0.00060.07240.06860.06230.06030.05382 B0,05610,06233A00.0730.06920.06290.06140.05443 B0.05610.06231-

20、72UNF2A0.00060.07240.06890.06340.06150.05592B0,0580.063530.060.060.06230,050.06A00.07395460.0565B8352-5620.000.0850.080.070.07120,060.07UNCA064133870.0642B673730.080.070.07230.060.07A00.086194480.0648B67372-6420.000.0850.080.070.07320.060.07UNFA064165330.0668B915330.080.070.07430,060.07A00.086225940

21、.0674B91533-4820.000.0980.090.080.08220.070.08UNCA073384850.0734B644530.090.080.08330,070.08A00.099455580.0741B64453-5620.000.0980.090.080.08420.070.08UNFA073426750.0771B976530.090.080.08530,070.08A00.099497480.0778B97654-4020.000.1110.100.090.09220.080.09UNCA08261550.0814B493930.100.090.09330.080.0

22、9A00.112695890.0822B49394-4820.000.1110.100.090.09520,080.09UNFA073687840.0864B946830.100.090.09630.080.09A00.112758570.0871B94685-4020.000.1240.110.100.10520,090.10UNCA08291840.0944B796230.110.100.10630.090.10A00.125998890.0952B79625-4420.000.1240.110.1020.100.10UNFA07395950.1070.0972B047930.120.110.10830.100,10A00.125020230.0979B04796-3220.000.1370.130.110.11420.100.11UNCA082126910.1B4430.130.110.11530.100.11A00.13827760.1008B446-4020.000.1370.130.120.11820.110.11UNFA08221140.1074B1930.130.120.11930.1