1、美制螺纹尺寸表单位：mm外螺纹内螺纹公称 螺纹牙牙螺公差螺纹外径螺纹中径螺纹小径 公差螺纹小径螺纹中径螺纹外径钻孔直径规格数高距代号MaxMinMaxMinMax代号MinMaxMinMaxMin直径0.073（#1）1-64UNC640.2360.3972A1.83896 1.74244 1.58242 1.53162 1.366522B1.42494 1.58242 1.597661.66371.85421.3971.8543A1.85421.75768 1.59766 1.55956 1.381763B1.42494 1.58242 1.59766 1.645921.85421.3971
2、-72UNF720.210.3532A1.83896 1.75006 1.610361.56211.419862B1.47321.61291.62561.68911.85421.51133A1.85421.76531.62561.590041.43513B1.47321.61291.62561.673861.85421.51130.086(#2)2-56UNC560.2710.4542A2.16916 2.06502 1.87452 1.82118 1.630682B1.69418 1.87198 1.88976 1.960882.18441.70182.1843A2.18442.08026
3、1.88976 1.84912 1.645923B1.69418 1.87198 1.889761.94312.18441.70182-64UNF640.2360.3972A2.16916 2.07264 1.91262 1.86182 1.696722B1.75514 1.91262 1.92786 1.996442.18441.7783A2.18442.08788 1.92786 1.88976 1.711963B1.75514 1.91262 1.92786 1.978662.18441.7780.099(3#)3-48UNC480.3150.5292A2.49682 2.38252 2
4、.153922.09551.864362B1.940562.14632.17172.24792.51461.99392.5153A2.51462.40032.17172.12852 1.882143B1.940562.14632.17172.227582.51461.99393-56UNF560.2710.4542A2.49682 2.39268 2.202182.14631.958342B2.024382.19712.21996 2.291082.51462.05743A2.51462.41046 2.21996 2.17932 1.976123B2.024382.19712.219962.
5、27332.51462.05740.112(#4)4-40UNC400.3780.6352A2.82448 2.694942.4132.34952.067562B2.15646 2.38506 2.43332 2.517142.84482.18442.8453A2.84482.71526 2.43332 2.38506 2.087883B2.15646 2.38506 2.43332 2.494282.84482.18444-48UNF480.3150.5292A2.82702 2.71272 2.48412 2.42316 2.194562B2.27076 2.458722.50192.58
6、0642.84482.26063A2.84482.73052.50192.45618 2.212343B2.27076 2.458722.50192.560322.84482.26060.125(#5)5-40UNC400.3780.6352A3.15468 3.025142.74322.67716 2.397762B2.48666 2.69748 2.76352 2.847343.1752.52733.1753A3.1753.04546 2.76352 2.71526 2.418083B2.48666 2.69748 2.76352 2.827023.1752.52735-44UNF440.
7、3440.5772A3.157223.03532.78132.71782.468882B2.55016 2.74066 2.79908 2.880363.1752.57813A3.1753.05308 2.79908 2.75082 2.486663B2.55016 2.74066 2.54508 2.860043.1752.57810.138(#6）6-32UNC320.4720.7942A3.48488 3.33248 2.96926 2.898142.542B2.64162.89562.98958 3.083563.50522.70513.5053A3.50523.35282.98958
8、 2.93624 2.560323B2.64162.89562.98958 3.058163.50522.70516-40UNF400.3780.6352A3.48488 3.355343.07343.00736 2.727962B2.81943.02263.09372 3.180083.50522.87023A3.50523.37566 3.09372 3.04292 2.748283B2.81943.01244 3.09372 3.157223.50522.87020.164（#8）8-32UNC320.4720.7842A4.14274 3.99034 3.62712 3.55346 3
9、.197862B3.3023.53063.649983.74654.16563.45444.1663A4.16564.01323.649983.59413.220723B3.3023.52806 3.649983.72114.16563.45448-36UNF360.4210.7062A4.14528 4.00558 3.68808 3.61696 3.304542B3.40363.60683.70843.799844.16563.45443A4.16564.02593.70843.65506 3.324863B3.40363.596643.70843.776984.16563.45440.1
10、9（#10）10-24UNC240.631.0582A4.80064.61772 4.11226 4.02844 3.540762B3.6833.96244.13766 4.246884.8263.73384.8263A4.8264.64312 4.13766 4.07416 3.566163B3.6833.94974.13766 4.218944.8263.733810-28UNS280.540.9072A4.80064.63554.211324.12753.718562B3.83544.0644.23672 4.345944.8263.860810-32UNF320.4720.7842A4
11、.80314 4.65074 4.28752 4.21132 3.858262B3.96244.16564.31038 4.409444.8263.98783A4.8264.67364.31038 4.25196 3.881123B3.96244.16814 4.31038 4.384044.8263.987810-36UNS360.4210.7062A4.80314 4.66344 4.34594 4.269743.96242B4.0644.21644.36884.467864.8264.038610-40UNS400.3780.6352A4.803144.67364.391664.3184
12、.043682B4.14024.29264.414524.50854.8264.089410-48UNS480.3150.5292A4.80568 4.69138 4.46278 4.39674 4.175762B4.24184.36884.48314.569464.8264.216410-56UNS560.2710.4542A4.80822 4.70408 4.51358 4.45008 4.269742B4.34344.4454.53136 4.612644.8264.30530.216（#12）12-24UNC240.631.0582A5.4615.27812 4.772664.6863
13、4.201162B4.34344.59744.79806 4.909825.48644.49580.4863A5.48645.30352 4.79806 4.73202 4.226563B4.34344.58978 4.79806 4.881885.48644.495812-28UNF280.540.9072A5.4615.29594.87172 4.79044 4.378962B4.49584.72444.897125.00385.48644.5723A5.48645.32134.89712 4.83616 4.404363B4.49584.71678 4.89712 4.975865.48
14、644.57212-32UNEF320.4720.7842A5.46354 5.31114 4.94792 4.86918 4.518662B4.62284.8264.97078 5.074925.48644.5723A5.48645.3344.97078 4.90982 4.541523B4.62284.81334.97078 5.049525.48644.57212-36UNS360.4210.7062A5.46354 5.32384 5.00634 4.93014 4.879342B4.72444.87685.02925.128265.48644.800612-40UNS400.3780
15、.6352A5.463545.3345.052064.97844.66092B4.80064.9535.074925.16895.48644.851412-48UNS480.3150.5292A5.46608 5.35178 5.12318 5.05714 4.836162B4.90225.02925.14355.229865.48644.978412-56UNS560.2710.4542A5.46862 5.36448 5.17398 5.11048 4.930142B5.00385.10545.19176 5.273045.48644.97840.251/4-20UNC200.7561.2
16、71A6.32206 6.01218 5.49656 5.35432 4.810761B4.97845.25785.52455.709926.355.10546.352A6.32206 6.11632 5.49656 5.40258 4.810762B4.97845.25785.52455.648966.355.10543A6.356.144265.52455.453384.83873B4.97845.250185.52455.615946.355.10541/4-24UNS240.631.0582A6.32206 6.13918 5.63372 5.53974 5.062222B5.2075
17、.4615.66166 5.783586.355.30861/4-27UNS270.560.9412A6.32466.15442 5.71246 5.62356 5.204462B5.3345.56265.73786 5.852166.355.41021/4-28UNF280.540.9071A6.32466.07568 5.73532 5.60832 5.242561B5.35945.5885.76072 5.925826.355.41022A6.32466.15955.735325.65155.242562B5.35945.5886.82752 5.869946.355.41023A6.3
18、56.18495.76072 5.69722 5.267963B5.35945.56266.827525.8426.355.41021/4-32UNEF320.4720.7842A6.32466.17225.808985.72775.379722B5.48645.68965.83438 5.941066.355.554983A6.355.68965.83438 5.77342 5.405123B5.48645.66166 5.83438 5.913126.355.554981/4-36UNS360.4210.7062A6.32714 6.18744 5.869945.79125.488942B
19、5.5885.74045.89285.99446.355.61341/4-40UNS400.3780.6352A6.327146.19765.915665.8425.570222B5.66425.81665.93852 6.035046.355.79121/4-48UNS480.3150.5292A6.32968 6.21538 5.986785.91825.697222B5.76585.89286.00716.098546.355.79121/4-56UNS560.2710.5452A6.32968 6.22554 6.035045.9695.79122B5.86745.9696.05536
20、 6.139186.355.94360.31255/16-18UNC180.8411.4111A7.90702 7.57428 6.99008 6.83514 6.228081B6.40086.7317.02056 7.221227.93756.52787.93752A7.90702 7.68604 6.99008 6.88848 6.228082B6.40086.7317.02056 7.155187.93756.52783A7.93757.71652 7.02056 6.94436 6.258563B6.40086.68027.02056 7.119627.93756.52785/16-2
21、0UN200.7561.272A7.90702 7.70128 7.08152 6.97992 6.395722B6.55326.8587.1127.244087.93756.746243A7.93757.731767.1127.03586.42623B6.55326.80727.1127.211067.93756.746245/16-24240.631.0581A79095.6 7.63524 7.22122 7.08152 6.649721B6.78187.03587.249167.42957.93756.90882A7.90956 7.72668 7.22122 7.12724 6.64
22、9722B6.78187.03587.24916 7.371087.93756.90883A7.93757.75462 7.24916 7.18058 6.677663B6.78186.99516 7.249167.34067.93756.90885/8-27UNS270.560.9412A7.91217.74192 7.29996 7.21106 6.791962B6.90887.13747.24916 7.439667.93757.03585/8-28UN280.540.9072A7.91217.7477.32282 7.23646 6.830062B6.95967.16287.34822
23、 7.459987.93757.03583A7.93757.77247.34822 7.28218 6.855463B6.95967.12978 7.34822 7.432047.93757.03585/8-32UNEF320.4720.7842A7.91217.75977.31527.31526.967222B7.08667.26447.42188 7.528567.93757.142483A7.93757.78517.36092 7.36092 6.992623B7.08667.23138 7.42188 7.500627.93757.142485/8-36UNS360.4210.7062
24、A7.91464 7.77494 7.457445.32137.07392B7.16287.34067.48037.58197.93757.142485/8-40UNS400.3780.6352A7.914647.78517.503167.42957.157722B7.2397.39147.52602 7.622547.93757.3665/8-48UNS 40.312 0.3150.5292A7.91718 7.80288 7.574287.50577.287262B7.3667.4937.59467.686047.93757.3660.3253/8-16UNC180.8411.4111A9
25、.491989.13138.46074 8.29564 7.599681B7.79788.15348.49376 8.709669.5257.93758.2552A9.49198 9.25322 8.46074 8.34898 7.599682B7.79788.15348.49376 8.638549.5257.93753A9.5259.28624 8.49376 8.409947.63273B7.79788.08228 8.49376 8.602989.5257.93753/8-18UNS180.8411.4112A9.491989.2718.57504 8.46582 7.813042B8
26、.0018.33128.608068.75039.5258.02643/8-20UN200.7561.272A9.49452 9.28878 8.66902 8.56488 7.983222B8.15348.43288.69958.836669.5258.333743A9.5259.319268.69958.620768.01373B8.15348.374388.69958.69959.5258.333743/8-24UNF240.631.0581A9.49706 9.22274 8.80872 8.66394 8.237221B8.3828.6368.83666 8.836669.5258.
27、43282A9.49706 9.31418 8.808728.71228.237222B8.3828.6368.83666 8.961129.5258.43283A9.5259.34212 8.836668.7638.265163B8.3829.44888.83666 8.513069.5258.43283/8-27UNS270.560.9412A9.49706 9.32688 8.88492 8.79348 8.376922B8.5098.73768.91286 9.032249.5258.61063/8-28UN280.540.9072A9.49706 9.33196 8.90778 8.
28、81634 8.415022B8.53448.7638.93572 9.052569.5258.61063A9.5259.35998.93572 8.86714 8.442963B8.53448.70204 8.93572 9.024629.5258.61063/8-32UNEF320.4720.7842A8.569969.34728.98398 8.89762 8.554722B8.66148.86469.00938 9.121149.5258.83923A9.5259.37269.00938 8.94588 8.580123B8.66148.81126 9.009389.09329.525
29、8.83923/8-36UNS360.4210.7062A9.49969.35999.04248.96112 8.658862B8.7638.94089.06789.174489.5258.83923/8-40UNC400.3780.6352A9.502149.37269.09066 9.01192 8.745222B8.83928.99169.11352 9.215129.5258.83920.39 9.9060.390-27UNS270.560.9412A9.87806 9.70788 9.26592 9.17448 8.757922B8.899.11869.29386 9.413249.
30、9068.83920.43757/16-14UNC141.0811.8141A11.0769 10.6832 9.89838 9.71804 8.917941B9.1449.55049.93394 10.1676 11.11259.347211.112A11.0769 10.8153 9.898389.7798.917942B9.1449.55049.93394 10.0889 11.11259.34723A11.1125 10.8509 9.93394 9.845048.95353B9.1449.44118 9.93394 10.0508 11.11259.34727/16-16UNS160
31、.861.5882A11.0769 10.8382 10.0457 9.92886 9.184642B9.3989.753610.0813 10.2311 11.11259.57583A11.0668 10.8737 10.08139.99499.22023B9.3989.65210.0813 10.1956 11.11259.57587/16-18UNS180.8411.4112A11.0795 10.8585 10.1625 10.0533 9.400542B9.57589.90610.1956 10.3378 11.11259.80447/16-20UNF200.7561.271A11.
32、0795 10.7696 10.9398 10.0965 9.568181B9.728210.03310.28710.4927 11.0668 9.921242A11.0795 10.8737 10.9398 10.1473 9.568182B9.728210.03310.28710.4242 11.0668 9.921243A11.1125 10.9068 10.3124 10.20839.60123B9.72829.9466410.28710.3911 11.0668 9.921247/16-24UNS240.631.0582A11.0846 10.9017 10.3962 10.2997
33、 9.824722B9.956810.2108 10.4242 10.5486 11.0668 10.08387/16-27UNS270.560.9412A11.0846 10.9144 10.472410.3819.964422B10.0838 10.3124 10.5004 10.6197 11.1125 10.26167/16-28UNEF280.540.9072A11.0846 10.9195 10.4953 10.4038 10.00252B10.1346 10.3378 10.5232 10.6401 11.1125 10.26163A11.1125 10.9474 8.67232 10.4546 10.03053B10.1346 11.4579 10.5232 10.6121 11.1125 10.26167/16-32UN320.4720.7842A11.0871 10.9
