|
3级标准系列统一螺纹的极限尺寸 |
|||||||||||
|
公称直径 -牙数 |
系列 代号 |
|
3B 内螺纹 |
||||||||
|
大径 d |
中径 d2 |
UNR 小径d3 (参考) |
小径 D1 |
中径 D2 |
大径 D |
||||||
|
max |
min |
max |
min |
max |
min |
max |
min |
max |
min |
||
|
1-8 |
UNC |
1.0000 |
0.9850 |
0.9188 |
0.9137 |
0.8512 |
0.8650 |
0.8797 |
0.9188 |
0.9254 |
1.0000 |
|
1-12 |
UNF |
1.0000 |
0.9886 |
0.9459 |
0.9415 |
0.9008 |
0.9100 |
0.9198 |
0.9459 |
0.9516 |
1.0000 |
|
1-16 |
UN |
1.0000 |
0.9906 |
0.9594 |
0.9557 |
0.9256 |
0.9320 |
0.9409 |
0.9594 |
0.9643 |
1.0000 |
|
1-20 |
UNEF |
1.0000 |
0.9919 |
0.9675 |
0.9641 |
0.9405 |
0.9460 |
0.9536 |
0.9675 |
0.9719 |
1.0000 |
|
1-28 |
UN |
1.0000 |
0.9935 |
0.9768 |
0.9738 |
0.9575 |
0.9610 |
0.9676 |
0.9768 |
0.9807 |
1.0000 |
|
1-32 |
UN |
1.0000 |
0.9940 |
0.9797 |
0.9769 |
0.9628 |
0.9660 |
0.9719 |
0.9797 |
0.9834 |
1.0000 |
|
11/16-8 |
UN |
1.0625 |
1.0475 |
0.9813 |
0.9762 |
0.9137 |
0.9270 |
0.9422 |
0.9813 |
0.9880 |
1.0625 |
|
11/16-12 |
UN |
1.0625 |
1.0511 |
1.0084 |
1.0041 |
0.9633 |
0.9720 |
0.9823 |
1.0084 |
1.0139 |
1.0625 |
|
11/16-16 |
UN |
1.0625 |
1.0531 |
1.0219 |
1.0181 |
0.9881 |
0.9950 |
1.0034 |
1.0219 |
1.0268 |
1.0625 |
|
11/16-18 |
UNEF |
1.0625 |
1.0538 |
1.0264 |
1.0228 |
0.9963 |
1.0020 |
1.0105 |
1.0264 |
1.0311 |
1.0625 |
|
11/16-20 |
UN |
1.0625 |
1.0544 |
1.0300 |
1.0266 |
1.0030 |
1.0080 |
1.0161 |
1.0300 |
1.0345 |
1.0625 |
|
11/16-28 |
UN |
1.0625 |
1.0560 |
1.0393 |
1.0363 |
1.0200 |
1.0240 |
1.0301 |
1.0393 |
1.0432 |
1.0625 |
|
11/8-7 |
UNC |
1.1250 |
1.1086 |
1.0322 |
1.0268 |
0.9549 |
0.9700 |
1.0322 |
1.0322 |
1.0393 |
1.1250 |
|
11/8-8 |
UN |
1.1250 |
1.1100 |
1.0438 |
1.0386 |
0.9762 |
0.9900 |
1.0438 |
1.0438 |
1.0505 |
1.1250 |
|
11/8-12 |
UNF |
1.1250 |
1.1136 |
1.0709 |
1.0664 |
1.0258 |
1.0350 |
1.0709 |
1.0709 |
1.0768 |
1.1250 |
|
11/8-16 |
UN |
1.1250 |
1.1156 |
1.0844 |
1.0806 |
1.0506 |
1.0570 |
1.0844 |
1.0844 |
1.0893 |
1.1250 |
|
11/8-18 |
UNEF |
1.1250 |
1.1163 |
1.0889 |
1.0853 |
1.0588 |
1.0650 |
1.0889 |
1.0889 |
1.0936 |
1.1250 |
|
11/8-20 |
UN |
1.1250 |
1.1169 |
1.0925 |
1.0890 |
1.0655 |
1.0710 |
1.0925 |
1.0925 |
1.0970 |
1.1250 |
|
11/8-28 |
UN |
1.1250 |
1.1185 |
1.1018 |
1.0988 |
1.0825 |
1.0860 |
1.1018 |
1.1018 |
1.1057 |
1.1250 |
|
13/16-8 |
UN |
1.1875 |
1.1725 |
1.1063 |
1.1011 |
1.0387 |
1.0520 |
1.1063 |
1.1063 |
1.1131 |
1.1875 |
|
13/16-12 |
UN |
1.1875 |
1.1761 |
1.1334 |
1.1291 |
1.0883 |
1.0970 |
1.1334 |
1.1334 |
1.1390 |
1.1875 |
|
13/16-16 |
UN |
1.1875 |
1.1781 |
1.1469 |
1.1431 |
1.1131 |
1.1200 |
1.1469 |
1.1469 |
1.1518 |
1.1875 |
|
13/16-18 |
UNEF |
1.1875 |
1.1788 |
1.1514 |
1.1478 |
1.1213 |
1.1270 |
1.1514 |
1.1514 |
1.1561 |
1.1875 |
|
13/16-20 |
UN |
1.1875 |
1.1794 |
1.1550 |
1.1515 |
1.1280 |
1.1330 |
1.1550 |
1.1550 |
1.1595 |
1.1875 |
|
13/16-28 |
UN |
1.1875 |
1.1810 |
1.1643 |
1.1613 |
1.1450 |
1.1490 |
1.1643 |
1.1643 |
1.1683 |
1.1875 |
|
11/4-7 |
UNC |
1.2500 |
1.2336 |
1.1572 |
1.1517 |
1.0799 |
1.0950 |
1.1572 |
1.1572 |
1.1644 |
1.2500 |
|
11/4-8 |
UN |
1.2500 |
1.2350 |
1.1688 |
1.1635 |
1.1012 |
1.1150 |
1.1688 |
1.1688 |
1.1757 |
1.2500 |
|
11/4-12 |
UNF |
1.2500 |
1.2386 |
1.1959 |
1.1913 |
1.1508 |
1.1600 |
1.1959 |
1.1959 |
1.2019 |
1.2500 |
|
11/4-16 |
UN |
1.2500 |
1.2406 |
1.2094 |
1.2056 |
1.1756 |
1.1820 |
1.2094 |
1.2094 |
1.2144 |
1.2500 |
|
11/4-18 |
UNEF |
1.2500 |
1.2413 |
1.2139 |
1.2103 |
1.1838 |
1.1900 |
1.2139 |
1.2139 |
1.2186 |
1.2500 |
|
11/4-20 |
UN |
1.2500 |
1.2419 |
1.2175 |
1.2140 |
1.1905 |
1.1960 |
1.2175 |
1.2175 |
1.2220 |
1.2500 |
|
11/4-28 |
UN |
1.2500 |
1.2435 |
1.2268 |
1.2237 |
1.2075 |
1.2110 |
1.2268 |
1.2268 |
1.2308 |
1.2500 |
|
15/16-8 |
UN |
1.3125 |
1.2975 |
1.2313 |
1.2260 |
1.1637 |
1.1770 |
1.2313 |
1.2313 |
1.2382 |
1.3125 |
|
15/16-12 |
UN |
1.3125 |
1.3011 |
1.2584 |
1.2540 |
1.2133 |
1.2220 |
1.2584 |
1.2584 |
1.2641 |
1.3125 |
|
15/16-16 |
UN |
1.3125 |
1.3031 |
1.2719 |
1.2681 |
1.2381 |
1.2450 |
1.2719 |
1.2719 |
1.2769 |
1.3125 |
|
15/16-18 |
UNEF |
1.3125 |
1.3038 |
1.2764 |
1.2727 |
1.2463 |
1.2520 |
1.2764 |
1.2764 |
1.2812 |
1.3125 |
|
15/16-20 |
UN |
1.3125 |
1.3044 |
1.2800 |
1.2765 |
1.2530 |
1.2580 |
1.2800 |
1.2800 |
1.2846 |
1.3125 |
|
15/16-28 |
UN |
1.3125 |
1.3060 |
1.2893 |
1.2862 |
1.2700 |
1.2740 |
1.2893 |
1.2893 |
1.2933 |
1.3125 |
|
13/8-6 |
UNC |
1.3750 |
1.3568 |
1.2667 |
1.2607 |
1.1765 |
1.1950 |
1.2667 |
1.2667 |
1.2745 |
1.3750 |
|
13/8-8 |
UN |
1.3750 |
1.3600 |
1.2938 |
1.2884 |
1.2262 |
1.2400 |
1.2938 |
1.2938 |
1.3008 |
1.3750 |
|
13/8-12 |
UNF |
1.3750 |
1.3636 |
1.3209 |
1.3162 |
1.2758 |
1.2580 |
1.2948 |
1.3209 |
1.3270 |
1.3750 |
|
13/8-16 |
UN |
1.3750 |
1.3656 |
1.3344 |
1.3305 |
1.3006 |
1.3070 |
1.3159 |
1.3344 |
1.3394 |
1.3750 |
|
13/8-18 |
UNEF |
1.3750 |
1.3663 |
1.3389 |
1.3352 |
1.3088 |
1.3150 |
1.3230 |
1.3389 |
1.3437 |
1.3750 |
|
13/8-20 |
UN |
1.3750 |
1.3669 |
1.3425 |
1.3390 |
1.3155 |
1.3210 |
1.3286 |
1.3425 |
1.3471 |
1.3750 |
|
13/8-28 |
UN |
1.3750 |
1.3685 |
1.3518 |
1.3487 |
1.3325 |
1.3360 |
1.3426 |
1.3518 |
1.3558 |
1.3750 |
|
17/16-6 |
UN |
1.4375 |
1.4193 |
1.3292 |
1.3232 |
1.2390 |
1.2570 |
1.2771 |
1.3292 |
1.3370 |
1.4375 |
|
17/16-8 |
UN |
1.4375 |
1.4225 |
1.3563 |
1.3509 |
1.2887 |
1.3020 |
1.3172 |
1.3563 |
1.3634 |
1.4375 |
|
17/16-12 |
UN |
1.4375 |
1.4261 |
1.3834 |
1.3790 |
1.3383 |
1.3470 |
1.3573 |
1.3834 |
1.3891 |
1.4375 |
|
17/16-16 |
UN |
1.4375 |
1.4281 |
1.3969 |
1.3930 |
1.3631 |
1.3700 |
1.3784 |
1.3969 |
1.4020 |
1.4375 |
|
17/16-18 |
UNEF |
1.4375 |
1.4288 |
1.4014 |
1.3977 |
1.3713 |
1.3770 |
1.3855 |
1.4014 |
1.4062 |
1.4375 |
|
17/16-20 |
UN |
1.4375 |
1.4294 |
1.4050 |
1.4014 |
1.3780 |
1.3830 |
1.3911 |
1.4050 |
1.4096 |
1.4375 |
|
17/16-28 |
UN |
1.4375 |
1.4310 |
1.4143 |
1.4112 |
1.3950 |
1.3990 |
1.4051 |
1.4143 |
1.4184 |
1.4375 |
|
11/2-6 |
UNC |
1.5000 |
1.4818 |
1.3917 |
1.3856 |
1.3015 |
1.3200 |
1.3396 |
1.3917 |
1.3996 |
1.5000 |
|
11/2-8 |
UN |
1.5000 |
1.4850 |
1.4188 |
1.4133 |
1.3512 |
1.3650 |
1.3797 |
1.4188 |
1.4259 |
1.5000 |
|
11/2-12 |
UNF |
1.5000 |
1.4886 |
1.4459 |
1.4411 |
1.4008 |
1.4100 |
1.4198 |
1.4459 |
1.4522 |
1.5000 |
|
11/2-16 |
UN |
1.5000 |
1.4906 |
1.4594 |
1.4555 |
1.4256 |
1.4320 |
1.4409 |
1.4594 |
1.4645 |
1.5000 |
|
11/2-18 |
UNEF |
1.5000 |
1.4913 |
1.4639 |
1.4602 |
1.4338 |
1.4400 |
1.4480 |
1.4639 |
1.4687 |
1.5000 |
|
11/2-20 |
UN |
1.5000 |
1.4919 |
1.4675 |
1.4639 |
1.4405 |
1.4460 |
1.4536 |
1.4675 |
1.4721 |
1.5000 |
|
11/2-28 |
UN |
1.5000 |
1.4935 |
1.4768 |
1.4737 |
1.4575 |
1.4610 |
1.4676 |
1.4768 |
1.4809 |
1.5000 |
|
19/16-6 |
UN |
1.5625 |
1.5443 |
1.4542 |
1.4481 |
1.3640 |
1.3820 |
1.4021 |
1.4542 |
1.4622 |
1.5625 |
|
19/16-8 |
UN |
1.5625 |
1.5475 |
1.4813 |
1.4758 |
1.4137 |
1.4270 |
1.4422 |
1.4813 |
1.4885 |
1.5625 |
|
19/16-12 |
UN |
1.5625 |
1.5511 |
1.5084 |
1.5040 |
1.4633 |
1.4720 |
1.4823 |
1.5084 |
1.5142 |
1.5625 |
|
19/16-16 |
UN |
1.5625 |
1.5531 |
1.5219 |
1.5180 |
1.4881 |
1.4950 |
1.5034 |
1.5219 |
1.5270 |
1.5625 |
|
19/16-18 |
UNEF |
1.5625 |
1.5538 |
1.5264 |
1.5227 |
1.4963 |
1.5020 |
1.5105 |
1.5264 |
1.5313 |
1.5625 |
|
19/16-20 |
UN |
1.5625 |
1.5544 |
1.5300 |
1.5264 |
1.5030 |
1.5080 |
1.5161 |
1.5300 |
1.5347 |
1.5625 |
|
15/8-6 |
UN |
1.6250 |
1.6068 |
1.5167 |
1.5105 |
1.4265 |
1.4450 |
1.4646 |
1.5167 |
1.5247 |
1.6250 |
|
15/8-8 |
UN |
1.6250 |
1.6100 |
1.5438 |
1.5382 |
1.4762 |
1.4900 |
1.5047 |
1.5438 |
1.5510 |
1.6250 |
|
15/8-12 |
UN |
1.6250 |
1.6136 |
1.5709 |
1.5665 |
1.5258 |
1.5350 |
1.5448 |
1.5709 |
1.5767 |
1.6250 |
|
15/8-16 |
UN |
1.6250 |
1.6156 |
1.5844 |
1.5805 |
1.5506 |
1.5570 |
1.5659 |
1.5844 |
1.5895 |
1.6250 |
|
15/8-18 |
UNEF |
1.6250 |
1.6163 |
1.5889 |
1.5851 |
1.5588 |
1.5650 |
1.5730 |
1.5889 |
1.5938 |
1.6250 |
|
15/8-20 |
UN |
1.6250 |
1.6169 |
1.5925 |
1.5889 |
1.5655 |
1.5710 |
1.5786 |
1.5925 |
1.5972 |
1.6250 |
|
111/16-6 |
UN |
1.6875 |
1.6693 |
1.5792 |
1.5730 |
1.4890 |
1.5070 |
1.5271 |
1.5792 |
1.5873 |
1.6875 |
|
111/16-8 |
UN |
1.6875 |
1.6725 |
1.6063 |
1.6007 |
1.5387 |
1.5520 |
1.5672 |
1.6063 |
1.6136 |
1.6875 |
|
111/16-12 |
UN |
1.6875 |
1.6761 |
1.6334 |
1.6289 |
1.5883 |
1.5970 |
1.6073 |
1.6334 |
1.6392 |
1.6875 |
|
111/16-16 |
UN |
1.6875 |
1.6781 |
1.6469 |
1.6429 |
1.6131 |
1.6200 |
1.6284 |
1.6469 |
1.6520 |
1.6875 |
|
111/16-18 |
UNEF |
1.6875 |
1.6788 |
1.6514 |
1.6476 |
1.6213 |
1.6270 |
1.6355 |
1.6514 |
1.6563 |
1.6875 |
|
111/16-20 |
UN |
1.6875 |
1.6794 |
1.6550 |
1.6514 |
1.6280 |
1.6330 |
1.6411 |
1.6550 |
1.6597 |
1.6875 |
|
13/4-5 |
UNC |
1.7500 |
1.7295 |
1.6201 |
1.6134 |
1.5118 |
1.5330 |
1.5575 |
1.6201 |
1.6288 |
1.7500 |
|
13/4-6 |
UN |
1.7500 |
1.7318 |
1.6417 |
1.6354 |
1.5515 |
1.5700 |
1.5896 |
1.6417 |
1.6498 |
1.7500 |
|
13/4-8 |
UN |
1.7500 |
1.7350 |
1.6688 |
1.6631 |
1.6012 |
1.6150 |
1.6297 |
1.6688 |
1.6762 |
1.7500 |
|
13/4-12 |
UN |
1.7500 |
1.7386 |
1.6959 |
1.6914 |
1.6508 |
1.6600 |
1.6698 |
1.6959 |
1.7017 |
1.7500 |
|
13/4-16 |
UN |
1.7500 |
1.7406 |
1.7094 |
1.7054 |
1.6756 |
1.6820 |
1.6909 |
1.7094 |
1.7146 |
1.7500 |
|
13/4-20 |
UN |
1.7500 |
1.7419 |
1.7175 |
1.7139 |
1.6905 |
1.6960 |
1.7036 |
1.7175 |
1.7222 |
1.7500 |