|
标准系列统一螺纹的基本尺寸 in |
||||||
|
公称直径 |
基本大径 D，d |
牙 数 n |
系列代号 |
基本中径 D2，d2 |
内螺纹基本 小径D1 |
UNR外螺纹 设计牙型小径d3(参考) |
|
0 |
0.060 |
80 |
UNF |
0.0519 |
0.0465 |
0.0451 |
|
1 |
0.0730 |
64 |
UNC |
0.0629 |
0.0561 |
0.0544 |
|
1 |
0.0730 |
72 |
UNF |
0.0640 |
0.0580 |
0.0565 |
|
2 |
0.0860 |
56 |
UNC |
0.0744 |
0.0667 |
0.0647 |
|
2 |
0.0860 |
64 |
UNF |
0.0759 |
0.0691 |
0.0674 |
|
3 |
0.0990 |
48 |
UNC |
0.0855 |
0.0764 |
0.0742 |
|
3 |
0.0990 |
56 |
UNF |
0.0874 |
0.0797 |
0.0777 |
|
4 |
0.1120 |
40 |
UNC |
0.0958 |
0.0849 |
0.0822 |
|
4 |
0.1120 |
48 |
UNF |
0.0985 |
0.0894 |
0.0872 |
|
5 |
0.1250 |
40 |
UNC |
0.1088 |
0.0979 |
0.0952 |
|
5 |
0.1250 |
44 |
UNF |
0.1102 |
0.1004 |
0.0979 |
|
6 |
0.1380 |
32 |
UNC |
0.1177 |
0.1042 |
0.1008 |
|
6 |
0.1380 |
40 |
UNF |
0.1218 |
0.1109 |
0.1082 |
|
8 |
0.1640 |
32 |
UNC |
0.1437 |
0.1302 |
0.1268 |
|
8 |
0.1640 |
36 |
UNF |
0.1460 |
0.1339 |
0.1309 |
|
10 |
0.1900 |
24 |
UNC |
0.1629 |
0.1449 |
0.1404 |
|
10 |
0.1900 |
32 |
UNF |
0.1697 |
0.1562 |
0.1528 |
|
12 |
0.2160 |
24 |
UNC |
0.1889 |
0.1709 |
0.1664 |
|
12 |
0.2160 |
28 |
UNF |
0.1928 |
0.1773 |
0.1735 |
|
12 |
0.2160 |
32 |
UNEF |
0.1957 |
0.1822 |
0.1788 |
|
1/4 |
0.2500 |
20 |
UNC |
0.2175 |
0.1959 |
0.1905 |
|
1/4 |
0.2500 |
28 |
UNF |
0.2268 |
0.2113 |
0.2075 |
|
1/4 |
0.2500 |
32 |
UNEF |
0.2297 |
0.2162 |
0.2128 |
|
5/16 |
0.3125 |
18 |
UNC |
0.2764 |
0.2524 |
0.2463 |
|
5/16 |
0.3125 |
20 |
UN |
0.2800 |
0.2584 |
0.2530 |
|
5/16 |
0.3125 |
24 |
UNF |
0.2854 |
0.2674 |
0.2629 |
|
5/16 |
0.3125 |
28 |
UN |
0.2893 |
0.2738 |
0.2700 |
|
5/16 |
0.3750 |
32 |
UNEF |
0.2922 |
0.2787 |
0.2753 |
|
3/8 |
0.3750 |
16 |
UNC |
0.3344 |
0.3073 |
0.3006 |
|
3/8 |
0.3750 |
20 |
UN |
0.3425 |
0.3209 |
0.3155 |
|
3/8 |
0.3750 |
24 |
UNF |
0.3479 |
0.3299 |
0.3254 |
|
3/8 |
0.3750 |
28 |
UN |
0.3518 |
0.3363 |
0.3325 |
|
3/8 |
0.3750 |
32 |
UNEF |
0.3547 |
0.3412 |
0.3378 |
|
7/16 |
0.3750 |
14 |
UNC |
0.3911 |
0.3602 |
0.3524 |
|
7/16 |
0.4375 |
16 |
UN |
0.3969 |
0.3698 |
0.3631 |
|
7/16 |
0.4375 |
20 |
UNF |
0.4050 |
0.3834 |
0.3780 |
|
7/16 |
0.4375 |
28 |
UNEF |
0.414. |
0.3988 |
0.3950 |
|
7/16 |
0.4375 |
32 |
UN |
0.4175 |
0.4037 |
0.4003 |
|
1/2 |
0.4375 |
13 |
UNC |
0.4500 |
0.4167 |
0.4084 |
|
1/2 |
0.4375 |
16 |
UN |
0.4594 |
0.4323 |
0.4256 |
|
1/2 |
0.5000 |
20 |
UNF |
0.4675 |
0.4459 |
0.4405 |
|
1/2 |
0.5000 |
28 |
UNEF |
0.4768 |
0.4613 |
0.4575 |
|
1/2 |
0.5000 |
32 |
UN |
0.4797 |
0.4662 |
0.4628 |
|
9/16 |
0.5625 |
12 |
UNC |
0.5084 |
0.4723 |
0.4633 |
|
9/16 |
0.5625 |
16 |
UN |
0.5219 |
0.4948 |
0.4881 |
|
9/16 |
0.5625 |
18 |
UNF |
0.5264 |
0.5024 |
0.4963 |
|
9/16 |
0.5625 |
20 |
UN |
0.5300 |
0.5084 |
0.5030 |
|
9/16 |
0.5625 |
24 |
UNEF |
0.5354 |
0.5174 |
0.5129 |
|
9/16 |
0.5625 |
28 |
UN |
0.5393 |
0.5238 |
0.5200 |
|
9/16 |
0.5625 |
32 |
UN |
0.5422 |
0.5287 |
0.5253 |
|
5/8 |
0.6250 |
11 |
UNC |
0.5660 |
0.5266 |
0.5167 |
|
5/8 |
0.6250 |
12 |
UN |
0.5709 |
0.5348 |
0.5258 |
|
5/8 |
0.6250 |
16 |
UN |
0.5844 |
0.5573 |
0.5506 |
|
5/8 |
0.6250 |
18 |
UNF |
0.5889 |
0.5649 |
0.5588 |
|
5/8 |
0.6250 |
20 |
UN |
0.5925 |
0.5709 |
0.5655 |
|
5/8 |
0.6250 |
24 |
UNEF |
0.5979 |
0.5799 |
0.5754 |
|
5/8 |
0.6250 |
28 |
UN |
0.6018 |
0.5863 |
0.5825 |
|
5/8 |
0.6250 |
32 |
UN |
0.6047 |
0.5912 |
0.5878 |
|
11/16 |
0.6875 |
12 |
UN |
0.6334 |
0.5973 |
0.5883 |
|
11/16 |
0.6875 |
16 |
UN |
0.6469 |
0.6198 |
0.6131 |
|
11/16 |
0.6875 |
20 |
UN |
0.6550 |
0.6334 |
0.6280 |
|
11/16 |
0.6875 |
24 |
UNEF |
0.6604 |
0.6424 |
0.6379 |
|
11/16 |
0.6875 |
28 |
UN |
0.6643 |
0.6488 |
0.6450 |
|
11/16 |
0.6875 |
32 |
UN |
0.6672 |
0.6537 |
0.6503 |
|
3/4 |
0.7500 |
10 |
UNC |
0.6850 |
0.6417 |
0.6309 |
|
3/4 |
0.7500 |
12 |
UN |
0.6959 |
0.6598 |
0.6508 |
|
3/4 |
0.7500 |
16 |
UNF |
0.7094 |
0.6823 |
0.6756 |
|
3/4 |
0.7500 |
20 |
UNEF |
0.7175 |
0.6959 |
0.6905 |
|
3/4 |
0.7500 |
28 |
UN |
0.7268 |
0.7113 |
0.7075 |
|
3/4 |
0.7500 |
32 |
UN |
0.7297 |
0.7162 |
0.7128 |
|
13/16 |
0.8125 |
12 |
UN |
0.7584 |
0.7223 |
0.7133 |
|
13/16 |
0.8125 |
16 |
UN |
0.7719 |
0.7448 |
0.7381 |
|
13/16 |
0.8125 |
20 |
UNEF |
0.7800 |
0.7584 |
0.7530 |
|
13/16 |
0.8125 |
28 |
UN |
0.7893 |
0.7738 |
0.7700 |
|
13/16 |
0.8125 |
32 |
UN |
0.7922 |
0.7787 |
0.7753 |
|
7/8 |
0.8750 |
9 |
UNC |
0.8028 |
0.7547 |
0.7427 |
|
7/8 |
0.8750 |
12 |
UN |
0.8209 |
0.7848 |
0.7758 |
|
7/8 |
0.8750 |
14 |
UNF |
0.8286 |
0.7977 |
0.7899 |
|
7/8 |
0.8750 |
16 |
UN |
0.8344 |
0.8073 |
0.8006 |
|
7/8 |
0.8750 |
20 |
UNEF |
0.8425 |
0.8209 |
0.8155 |
|
7/8 |
0.8750 |
28 |
UN |
0.8518 |
0.8363 |
0.8325 |
|
7/8 |
0.8750 |
32 |
UN |
0.8547 |
0.8412 |
0.8378 |
|
15/16 |
0.9375 |
12 |
UN |
0.8834 |
0.8473 |
0.8383 |
|
15/16 |
0.9375 |
16 |
UN |
0.8969 |
0.8698 |
0.8631 |
|
15/16 |
0.9375 |
20 |
UNEF |
0.9050 |
0.8834 |
0.8780 |
|
15/16 |
0.9375 |
28 |
UN |
0.9143 |
0.8988 |
0.8950 |
|
15/16 |
0.9375 |
32 |
UN |
0.9172 |
0.9037 |
0.9003 |