美制螺纹大全Word格式.docx
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9.4920
8.3490
8.4607
刀16-14
0,4258
0.4361
0.3850
0.3897
0.3485
(0.4375-14)
UNC
10.8153
11.0769
9.7790
9.8984
8,85199.83
9.87
1/2-13
0.4876
0.4985
0.4435
0.4485
0,4041
(0.50-13)
12.3850
12,6619
11,2649
11.3919
10.264111.34
11.38
9/16-12
0.5495
0.5609
0.5016
0.5068
0.4587
(0.5625-12)
13.9573
14.2469
12.7406
12.8727
11.651012.80
12,84
5/8-11
0.6113
0.6234
0.5589
0.5644
0.5119
(0.625-11)
15.5270
15,8344
14,1961
14.3358
13.002314.27
14.32
3/4-10
0.7353
0.7482
0.6773
0.6832
0,6255
(0.750-10)
18.6766
19.0043
17,2034
17.3533
15.887717.28
17.33
7/8-9
0.8592
0.8731
0.7946
0.8009
0.7368
(0.875-9)
21.8237
22,1767
20.1828
20.3429
18.714720.27
20.32
1"
-8
0.9830
0.9980
0.9100
0.9168
0.8446
23,27
(1.000-8)
24.9682
25,3492
23,1140
P3.P867
P1.45P823.22
大径极限
螺胚直径
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:
10・24UNC・2A(或0・190・24UNC・2A)、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
8-36
0.1577
0.1632
0.1424
0.1452
0.1291
3.65
3,67
(0.164-36)
4.0056
4.1453
3,6170
3.6881
3.2791
10-32
0.1831
0,1891
0.1658
0.1688
0.1508
(0.190-32)
4.6507
4,8031
4,2113
4.2875
3.8303
4.24
4,27
12-28
0.2085
0.1886
0.1918
0.1712
(0.216-28)
5.2959
4.7904
4.8717
4.3485
4.82
4,85
1/4-28
0.2425
0,2490
0.2225
0.2258
0.2052
(0.250-28)
6.1595
6,3246
5,6515
5.7353
5.2121
5.69
5.71
5/16-24
0.3042
0,3114
0,2806
0.2843
0.2603
(0.3175-24)
7.7267
7.9096
7.1272
7.2212
6.6116
7.17
7,20
3/8-24
0.3667
0.3739
0.3430
0.3468
0.3228
(0.375-24)
9.3142
9.4971
8.7122
8.8087
8.1991
8,75
8.78
7/16-20
UNF
0,4362
0.3995
0.4037
0.3749
(0.4375-20)
10.8737
11.0795
10.1473
10.2540
9.5225
10.19
10.23
1/2-20
0.4906
0,4987
0.4619
0.4662
0.4374
11.78
11.82
(0.50-20)
12.4612
12.6670
11,7323
11.8415
11.1100
9/16-18
0.5524
0.5611
0.5205
0.5250
0.4929
(0.5625-18)
14.0310
14.2519
13.2207
13.3350
12,5197
13.27
13.31
5/8-18
0.6149
0.6236
0,5828
0.5875
0.5554
(0.625-18)
15.6185
15,8394
14,8031
14.9225
14.1072
14.85
14.89
3/4-16
0.7391
0.7485
0.7029
0.7079
0.6718
(0.750-16)
18.7731
19.0119
17.8537
17.9807
17.0637
17.91
17.95
7/8-14
0.8631
0,8734
0.8216
0.8270
0.7858
(0.875-14)
21,9227
22.1844
20.8686
21.0058
19,9593
20.93
20.97
-12
0.9868
0.9982
0.9382
0.9441
0.8960
(1.000-12)
25.0647
25,3543
23.8303
23.9801
22.7584
23.90
23.95
2.标记示例:
10・32UNF・2A(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
曰—I—取A
最大
大径min
曰—取A
8-32
0.1300
0.1390
0.1437
0.1475
0.1640
3.3020
3.5306
3.6500
3.7465
4.1656
3.40
3.50
0.1450
0.1560
0.1629
0.1672
0.1900
3.75
3.90
3.6830
3.9624
4.1377
4.2469
4.8260
0.1710
0.1810
0,1889
0.1933
0,2160
4.3434
4.5974
4.7981
4.9098
5,48644.40
4,55
1/4-20
0,1960
0.2070
0.2175
0,2224
0,2500
4.9784
5.2578
5.5245
5,6490
6,35005.05
5,20
0,2520
0.2650
0.2764
0,2817
0,3125
6.4008
6.7310
7.0206
7.1552
7.93756.45
6.60
0,3070
0.3210
0.3344
0,3401
0,3750
7.7978
8.1534
8.4938
8.6385
9,52507.85
8,00
7/16-14
0.3600
0.3760
0.3911
0,3972
0,4375
9,1440
9.5504
9.9339
10.0889
11.11259.20
9,40
0.4170
0.4340
0,4500
0.4565
0,5000
10.5918
11.0236
11,4300
11.5951
12.700010.65
10.90
0,4720
0.4900
0.5084
0,5152
0,5625
11,9888
12,4460
12,9134
13.0861
14.287512.05
12,30
0.5270
0.5460
0.5660
0,5732
0.6250
(0,625-11)
13.3858
13.8684
14,3764
14.5593
15.875013.45
13,70
0.6420
0.6630
0.6850
0.6927
0.7500
16,3068
16,8402
17,3990
17.5946
19.050016.40
16.70
0,7550
0.7780
0.8028
0.8110
0.8750
19.1770
19.7612
20,3911
20.5994
22.225019.30
19.60
0.8650
0.8900
0.9188
0.9276
1,0000
21.9710
22.6060
23,3375
23.5610
25.400022.10
22,40
1・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。
10・24UNC・2B(或0.190-24UNC-2B)、3/8-16UNC-2B(或0・375・16UNC・2B)
美制内螺纹(2B)常用规格极限尺寸表(细牙)
rsT
取A
曰[亠取穴
最
0.1340
0.1420
0.1460
0.1496
3.4036
3,6068
3.7084
3.7998
3.45
0.1697
0.1736
4,3104
4.4094
4.00
0.1770
0,1860
0.1928
0,1970
0.2160
4.4958
4.7244
4,8971
5.0038
5.4864
4.55
1/4-28
0.2110
0.2200
0,2268
0.2311
0.2500U“
6.3500'
(0,250-28)
5.3594
5.5880
5.7607
5.8699
0.2670
0.2770
0,2854
0.2902
(0,3175-24)
6.7818
7.0358
7,2492
7,3711
7.93756.85
7.20
0.3300
0.3400
0.3479
0.3528
0.3750
(0,375-24)
8.3820
8.6360
8,8367
8.9611
9.52508.45
0.3830
0.3950
0.4050
0.4104
0.4375
9.7282
10.0330
10.2870
10.4242
11,11259.85
1/2-20
0.4460
0.4570
0,4675
0,4731
11.3284
11.6078
11.8745
12.0167
12.700011.40
0.5020
0.5150
0.5264
0.5323
0.5625
(0,5625-18)
12.7508
13.0810
13.3706
13.5204
14.287512.85
0.5650
0.5780
0,5889
0.5949
0,6250
(0,625-18)
14.3510
14.6812
14.9581
15.1105
15,875014,45
0.6820
0.6960
0.7094
0.7159
17.3228
17.6784
18.0188
18.1839
19.050017,40
0.7980
0.8140
0.8286
0.8356
20.2692
20.6756
21.0464
21.2242
22.225020.35
0.9280
0.9459
0.9535
1.0000
(1,000-12)
23.1140
23.5712
24.0259
24.2189
25.400023.90
10・32UNF・2B(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Internal
Nominal
Sine,Threadsper
Inch,and
SeriesDesignation
级别
C
Ia
s
公差
Allowance
大径MajorDiameter
中径PitchDiameter
UNRMinorDiam?
Max(Refj
小径MinorDiameter
Max^
Min
Mind
Max
h
0-80UNF
2
A
0.00
05
0.059
5
0.05
63
14
0.049
6
0.0446
2B
0.04
65
3
0.06
68
19
0,050
0.0451
3B
1-64UNC
06
0.072
4
86
23
0.060
0.0538
0,05
61
0,06
0.073
92
29
0.061
0.0544
1-72
89
34
0.0559
B
8
35
0.062
95
0.0565
2-56
0.085
0.08
0.07
0.071
13
38
7
0.0642
67
37
0.086
44
0.0648
2-64
16
53
0.0668
91
0.074
22
59
0.0674
3-48
0.098
0.09
0.082
07
48
0.0734
64
45
0.083
0,07
0.099
55
0.0741
3-56
0.084
42
0.0771
97
49
74
0.0778
4-40
0.111
0.10
0.092
08
0.0814
39
0.093
0.112
69
58
9
0.0822
4-48
0.095
0,08
78
0.0864
94
0.096
75
85
0.0871
5-40
0.124
0.11
0.105
0,09
0.0944
79
62
0.106
0.125
99
88
0.0952
5-44
0.107
0.0972
04
0.12
0.108
0,10
02
0.0979
6-32
0.137
0.13
0.114
12
1
0.1
0.115
0.138
77
0.1008
6-40
0.118
21
0.1074
0.119