美制标准系列统一螺纹的基本、公差和极限极限尺寸

32 12 16 20 28 32 9
UN UN UN UNEF UN UN UNC
7/8 12 UN
7/8 14 UNF
7/8 16 UN
7/8 20 UNEF
7/8 28 UN
175//81 156/1 156/1 156/1 156/1
61
32 12 16 20 28 32 8
UN UN UN UNEF UN UN UNC
5.4907
5.6793
5.6612
7.6848 7.6997
7.9067 7.9066
6.4099 6.5627
6.7313 6.8548
6.6795 6.8062
7.7264 7.9096
6.7918
7.0388
6.9953
7.7456 7.9109
6.9555
7.1693
7.1295
7.7611 7.9123
16.1012 16.3798
15.9625 16.2647
17.2485 17.4317 16.3168 16.5638 16.4648
17.2683 17.4335 16.4805 16.6943 16.6070
17.2838 17.4350 16.6032 16.7918 16.7131
18.6768 19.0051 18.7171 19.0079
12.5068 12.6720 11.7180 11.9318 11.8593
12.5223 12.6735 13.9569 14.2477
11.8407 11.9961
12.0293 12.4548
11.9636 12.3005
14.0115 14.2515 12.5690 第 1 页，共 8 页
外螺纹大经极限尺寸
内螺纹小经极限尺寸
2A和3A (min) 1.4285 1.7439
2A和3A (max) 1.5106 1.8392
小径 D1(min) 1.1803 1.4246
1B和2B (max) 1.3566 1.6162
3B (max) 1.3566 1.6162
1.7517 1.8397
UNEF UN UN UN UN UN UNEF UN UN UNC UN UNF UN UNEF UN UN UN UN UN UNEF UN UN UNC UN UNF UN UNEF UN UN UN UN UN UNEF UN UN UNC UN UNF UN UNEF UN UN UN UN UN
13.8686 14.0423
13.6921 13.8767
15.5986 15.8387 14.1565 14.5137 14.3819
15.6177 15.8396 14.3474 14.6688 14.5493
15.6352 15.8421 14.5002 14.7923 14.6827
15.6613 15.8445 14.7293 14.9763 14.8820
23.6172 23.7824 22.8305 23.0443 22.9464
23.6327 23.7839 22.9532 23.1418 23.0538
24.9676 25.3486 25.0646 25.3553
21.9630 23.1086
22.5980 23.5673
22.3249 23.3636
4.3407
4.5895
4.5895
5.2966 5.4618
4.5044
4.7173
4.7173
5.3109 6.1147
5.4621 6.3216
4.6271 4.9752
4.8126 5.2673
4.8126 5.2492
6.1594 6.3247
5.3680
5.5818
5.5638
6.1742 6.3254
1.4723
1.6399
1.6399
2.0641 2.1682
1.6934
1.8876
1.8876
2.0736 2.1689
1.7548
1.9218
1.9218
2.3817 2.3938
2.4971 2.4979
1.9418 2.0236
2.1475 2.1970
2.1475 2.1970
2.6954 2.8257
10.9352 11.0864 12.3865 12.6622
10.2532 10.5849
10.4418 11.0132
10.3829 10.8810
12.4243 12.6644 10.9815 11.3387 11.2259
12.4605 12.6673 11.3252 11.6173 11.5230
15.6811 15.8464 14.8930 15.1068 15.0235
15.6966 15.8478 15.0157 15.2043 15.1290
17.1299 17.4207 15.1711 15.6298 15.4550
17.1858 17.4258 17.2224 17.4292
15.7440 16.0877
20.4427 20.6080 20.4582 20.6094
19.6555 19.7782
19.8693 19.9668
19.7759 19.8827
21.8247 22.1770 19.1699 19.7500 19.5093
21.8916 22.1824 19.9336 20.3923 20.1977
22.0455 22.1967 21.3657 21.5543 21.4682
23.4788 23.7696 23.5347 23.7747
21.5211 22.0940
21.9798 22.4512
21.7804 22.2940
23.5713 23.7781 22.4377 22.7298 22.5999
18.0680 18.1907
18.2818 18.3793
18.1912 18.2977
20.3044 20.5951 18.3461 18.8048 18.6158
20.3602 20.6003 18.9190 19.2762 19.1268
20.3968 20.6037 19.2627 19.5548 19.4311
2.8178
3.0136
3.0136
3.9922 4.1434
3.3063
3.5267
3.5267
4.0045 4.6175
4.1442 4.8007
3.4018 3.6803
3.5966 3.9493
3.5966 3.9493
4.6519 4.8031
3.9667
4.1673
4.1673
5.2773 5.4605
2.1574
2.3853
2.3853
2.7114 2.8268
2.2720
2.4591
2.4591
3.0252 3.1555
2.4876
2.6978
2.6978
3.0338 3.1561
2.5501
2.7397
2.7397
3.3325 3.4837
2.6459
2.8937
2.8937
3.3550 3.4853
25.1220 25.3620 23.6815 第 2 页，共 8 页
24.0387
23.8783
公称 牙数 系列 直径 n 代号
1 20 1 28 1 32 11/16 8 11/16 12 11/16 16 11/16 18 11/16 20 11/16 28 11/8 7 11/8 8 11/8 12 11/8 16 11/8 18 11/8 20 11/8 28 13/16 8 13/16 12 13/16 16 13/16 18 13/16 20 13/16 28 11/4 7 11/4 8 11/4 12 11/4 16 11/4 18 11/4 20 11/4 28 15/16 8 15/16 12 15/16 16 15/16 18 15/16 20 15/16 28 13/8 6 13/8 8 13/8 12 13/8 16 13/8 18 13/8 20 13/8 28 17/16 6 17/16 8 17/16 12
外螺纹大经极限尺寸
内螺纹小经极限尺寸
2A和3A (min) 25.1814 25.2044
2A和3A (max) 25.3882 25.3697
小径 D1(min) 24.0252 24.4180
1B和2B (max) 24.3173 24.6318
12.9262
12.8029
公称 牙数 系列 直径 n 代号
9/16 18 UNF
9/16 20 UN
9/16 24 UNEF
9/16 28 UN
9/16 32 UN
5/8 11 UNC
5/8 12 UN
5/8 16 UN
5/8 18 UNF
5/8 20 UN
5/8 24 UNEF
5/8 28 UN
公称 牙数 系列 直径 n 代号
0 80 UNF 1 64 UNC 1 72 UNF 2 56 UNC 2 64 UNF 3 48 UNC 3 56 UNF 4 40 UNC 4 48 UNF 5 40 UNC 5 44 UNF 6 32 UNC 6 40 UNF 8 32 UNC 8 36 UNF 10 24 UNC 10 32 UNF 12 24 UNC 12 28 UNF 12 32 UNEF 1/4 20 UNC 1/4 28 UNF 1/4 32 UNEF 5/16 18 UNC 5/16 20 UN 5/16 24 UNF 5/16 28 UN 5/16 32 UNEF 3/8 16 UNC 3/8 20 UN 3/8 24 UNF 3/8 28 UN 3/8 32 UNEF 7/16 14 UNC 7/16 16 UN 7/16 20 UNF 7/16 28 UNEF 7/16 32 UN 1/2 13 UNC 1/2 16 UN 1/2 20 UNF 1/2 28 UNEF 1/2 32 UN 9/16 12 UNC 9/16 16 UN
14.0742 14.2573 13.1418 13.3888 13.3001
14.0939 14.2592 13.3055 13.5193 13.4408
14.1095 14.2607 13.4282 13.6168 13.5458
15.5250 15.8331 15.5428 15.8335
13.3753 13.5836
7.0782
7.2668
7.2296
9.2517 9.2867
9.4918 9.4936
7.8065 8.1502
8.1637 8.4423
8.0827 8.3734
9.3128 9.4960
8.3793
8.6263
8.5658
9.3326 9.4979
8.5430
8.75688.7Biblioteka 259.3482 9.4994
16.3004 16.7586
16.8338 17.2173
16.6248 17.0348
18.7717 19.0117 17.3315 17.6887 17.5442
18.8096 19.0164 17.6752 17.9673 17.8476
18.8555 19.0207 18.8710 19.0222
1 12 UNF
1 16 UN
外螺纹大经极限尺寸
内螺纹小经极限尺寸
2A和3A (min) 14.0310 14.0480
2A和3A (max) 14.2529 14.2549
小径 D1(min) 12.7599 12.9127
1B和2B (max) 13.0813 13.2048
3B (max) 12.9693 13.1020
151//81 116/1 116/1 116/1 116/1 116/1 36/4
32 12 16 20 24 28 32 10
UN UN UN UN UNEF UN UN UNC
3/4 12 UN
3/4 16 UNF
3/4 20 UNEF
3/4 28 UN
133//41 136/1 136/1 136/1 136/1 76/8
8.6657
8.8543
8.8044
10.8142 11.0766 9.1485
9.5502
9.4407
10.8372 11.0772 9.3940
9.7512
9.6521
10.8739 11.0807 9.7377 10.0298 9.9463
10.9197 11.0849 10.1305 10.3443 10.2796
21.9213 22.1837 20.2610 20.6627 20.4910
21.9475 22.1875 20.5065 20.8637 20.7101
21.9840 22.1909 20.8502 21.1423 21.0153
22.0299 22.1952 21.2430 21.4568 21.3610