Monday, October18, 2021
Privacy Policy
L-36.com

Machine Screw Diminsions

External Threads - Class 2A

Nominal Size -
Threads/lnch/
Series Designation
Allowance Major Diameter Pitch Diameter
Max Min Max Min Tolerance
0-80
1-64
1-72
2-56
2-64
UNF
UNC
UNF
UNC
UNF
0.0005
0.0006
0.0006
0.0006
0.0006
0.0595
0.0724
0.0724
0.0854
0.0854
0.0563
0.0686
0.0689
0.0813
0.0816
0.0514
0.0623
0.0634
0.0738
0.0753
0.0496
0.0603
0.0615
0.0717
0.0733
0.0018
0.0020
0.0019

0.0021
0.0020
3-48
3-56
4-40
4-48
5-40
UNC
UNF
UNC
UNF
UNC
0.0007
0.0007
0.0008
0.0007
0.0008
0.0938
0.0983
0.1112
0.1113
0.1242
0.0938
0.0942
0.1061
0.1068
0.1191
0.0848
0.0867
0.0950
0.0978
0.1080
0.0825
0.0845
0.0925
0.0954
0.1054
0.0023
0.0022
0.0025
0.0024
0.0026
5-44
6-32
6-40
8-32
8-36
UNF
UNC
UNF
UNC
UNF
0.0007
0.0008
0.0008
0.0009
0.0008
0.1243
0.1372
0.1372
0.1631
0.1632
0.1195
0.1312
0.1321
0.1571
0.1577
0.1095
0.1169
0.1210
0.1428
0.1452
0.1070
0.1141
0.1184
0.1399
0.1424
0.0025
0.0028
0.0026
0.0029
0.0028
10-24
10-32
12-24
12-28
1/4-20
UNC
UNF
UNC
UNF
UNC
0.0010
0.0009
0.0010
0.0010
0.0011
0.1890
0.1891
0.2150
0.2150
0.2489
0.1818
0.1831
0.2078
0.2085
0.2408
0.1619
0.1688
0.1879
0.1918
0.2164
0.1586
0.1658
0.1845
0.1886
0.2127
0.0033
0.0030
0.0034
0.0032
0.0037
1/4-28
5/16-18
5/16-24
3/8-16
3/8-24
UNF
UNC
UNF
UNC
UNF
0.0010
0.0012
0.0011
0.0013
0.0011
0.2490
0.3113
0.3114
0.3737
0.3739
0.2425
0.3026
0.3042
0.3643
0.3667
0.2258
0.2752
0.2843
0.3331
0.3468
0.2225
0.2712
0.2806
0.3287
0.3430
0.0033
0.0040
0.0037
0.0044
0.0038
7/16-14
7/16-20
1/2-13
1/2-20
9/16-12
UNC
UNF
UNC
UNF
UNC
0.0014
0.0013
0.0015
0.0013
0.0016
0.4361
0.4362
0.4985
0.4987
0.5609
0.4258
0.4281
0.4876
0.4906
0.5495
0.3897
0.4037
0.4485
0.4662
0.5068
0.3850
0.3995
0.4435
0.4619
0.5016
0.0047
0.0042
0.0050
0.0043
0.0052
9/16-18
5/8-11
5/8-18
3/4-10
3/4-16
UNF
UNC
UNF
UNC
UNF
0.0014
0.0016
0.0014
0.0018
0.0015
0.5611
0.6234
0.6236
0.7482
0.7485
0.5524
0.6113
0.6149
0.7353
0.7391
0.5250
0.5644
0.5875
0.6832
0.7079
0.5205
0.5589
0.5828
0.6773
0.7029
0.0045
0.0055
0.0047
0.0059
0.0050
7/8-9
7/8-14
1-8
1-12
1-14
UNC
UNF
UNC
UNF
UNS
0.0019
0.0016
0.0020
0.0018
0.0017
0.8731
0.0834
0.9980
0.9982
0.9983
0.8592
0.8631
0.9830
0.9868
0.9880
0.8009
0.8270
0.9168
0.9441
0.9519
0.7946
0.8216
0.9100
0.9382
0.9463
0.0063
0.0054
0.0068
0.0059
0.0056
11/8-7
11/8-8
11/8-12
11/4-7
1114-8
UNC
UN
UNF
UNC
UN
0.0022
0.0021
0.0018
0.022
0.0021
1.1228
1.1229
1.1232
1.2478
1.2479
1.1064
1.1079
1.1118
1.2314
1.2329
1.0300
1.0417
1.0691
1.1550
1.1667
1.0228
1.0348
1.0631
1.1476
1.1597
0.0072
0.0069
0.0060
0.0074
0.0070
11/4-12
1 3/8-6
1 3/8-8
1 3/8-12
11/2-6
UNF
UNC
UN
UNF
UNC
0.0018
0.0024
0.0022
0.0019
0.0024
1.2482
1.3726
1.3728
1.3731
1.4976
1.2368
1.3544
1.3578
1.3617
1.4794
1.1941
1.2643
1.2916
1.3190
1.3893
1.1879
1.2563
1.2844
1.3127
1.3812
0.0062
0.0080
0.0072
0.0063
0.0081
1 1/2-8
1 1/2-12
1 5/8-8
1 3/4-5
1 3/4-8
UN
UNC
UN
UNC
UN
0.0022
0.0019
0.0022
0.0027
0.0023
1.4978
1.4981
1.6228
1.7473
1.7477
1.4828
1.4867
1.6087
1.7268
1.7327
1.4166
1.4440
1.5416
1.6174
1.6665
1.4093
1.4376
1.5342
1.6085
1.6590
0.0073
0.0064
0.0074
0.0089
0.0075
1 7/8-8
2-4 1/2
2-8
2 1/4-4.5
2 1/4-8
UN
UNC
UN
UNC
UN
0.0023
0.0029
0.0023
0.0029
0.0024
1.8727
1.9971
1.9977
2.2471
2.2476
1.8577
1.9751
1.9827
2.2251
2.2326
1.7915
1.8528
1.9165
2.1028
2.1664
1.7838
1.8433
1.9087
2.0931
2.1584
0.0077
0.0095
0.0078
0.0097
0.0080
2 1/2-4
2 1/2-8
2 3/4-4
2 3/4-8
3-4
UNC
UN
UNC
UN
UNC
0.0031
0.0024
0.0032
0.0025
0.0032
2.4969
2.4976
2.7468
2.7475
2.9968
2.4731
2.4826
2.7230
2.7325
2.9730
2.3345
2.4164
2.5844
2.6663
2.8344
2.3241
2.4082
2.5739
2.6580
2.8237
0.0104
0.0082
0.0105
0.0083
0.0107
3-8
3 1/4-4
3 1/4-8
3 1/2-4
3 1/2-8
UN
UNC
UN
UNC
UN
0.0026
0.0033
0.0026
0.0033
0.0026
2.9974
3.2467
3.2474
3.4967
3.4974
2.9824
3.2229
3.2324
3.4729
3.4824
2.9162
3.0843
3.1662
3.3343
3.4162
2.9077
3.0734
3.1575
3.3233
3.4074
0.0085
0.0109
0.0087
0.0110
0.0088
3 3/4-4
3 3/4-8
4-4
4-8
UNC
UN
UNC
UN
0.0034
0.0027
0.0034
0.0027
3.7466
3.7473
3.9966
3.9973
3.7228
3.7323
3.9728
3.9823
3.5842
3.6661
3.8342
3.9161
3.5730
3.6571
3.8229
3.9070
0.0112
0.0090
0.0113
0.0091





Please read website Cookie, Privacy, and Disclamers by clicking HERE.