Unified Screw Threads, Standard Serie
No.3
5/8-11 UNC
to 7/8-32 UN

Pitch
P
Thread Per Inch
TPI = 1/P
Major diameter
screw
D MM ISOBasic thread
diameter screw
D " UST
Major diameter
nut
d MM ISOBasic thread
diameter nut
d " UST
Pitch diameter
D2=d2=D-0.64952*PPitch diameter
D2= d2=D-0.64952/TPI
Minor diameter
screw
D1= D-1.227*PMinor diameter
screw
D1= d1=D-1.227/TPI
Minor diameter
nut
d1= D-1.0826*PMinor diameter
nut
d1=D-1.0826/TPI
Total Height
H = 0.866*PTotal Height
H = 0.866/TPI
Screw thread
height
H = 0.6135*PScrew thread
height
H = 0.6135/TPI
External
Thread /Internal
Thread
Nominal
Size, TPI, Series
Class
D
Max
d1 MaxD
Min
d1 Min D2
Max
d2 Max D2
Min
d2 Min D1
Max
d
Min
Ext.
5/8-11 UNC
1A
0.6234
0.6052
0.5644
0.5561
0.5152
Int.
1B
0.5460
0.5270
0.5767
0.5660
0.6250
Ext.
5/8-11 UNC
2A
0.6234
0.6113
0.5644
0.5589
0.5152
Int.
2B
0.5460
0.5270
0.5732
0.5660
0.6250
Ext.
5/8-11 UNC
3A
0.6250
0.6129
0.5660
0.5619
0.5168
Int.
3B
0.5391
0.5270
0.5714
0.5660
0.6250
Ext.
5/8-12 UN
2A
0.6234
0.6120
0.5693
0.5639
0.5242
Int.
2B
0.5530
0.5350
0.5780
0.5709
0.6250
Ext.
5/8-12 UN
3A
0.6250
0.6136
0.5709
0.5668
0.5258
Int.
3B
0.5463
0.5350
0.5762
0.5709
0.6250
Ext.
5/8-14 UNS
2A
0.6235
0.6132
0.5771
0.5720
0.5385
Int.
2B
0.5640
0.5480
0.5852
0.5786
0.6250
Ext.
5/8-16 UN
2A
0.6236
0.6142
0.5830
0.5782
0.5491
Int.
2B
0.5710
0.5570
0.5906
0.5844
0.6250
Ext.
5/8-16 UN
3A
0.6250
0.6156
0.5844
0.5808
0.5505
Int.
3B
0.5662
0.5570
0.5890
0.5844
0.6250
Ext.
5/8-18 UNF
1A
0.6236
0.6105
0.5875
0.5805
0.5575
Int.
1B
0.5780
0.5650
0.5980
0.5889
0.6250
Ext.
5/8-18 UNF
2A
0.6236
0.6149
0.5875
0.5828
0.5575
Int.
2B
0.5780
0.5650
0.5949
0.5889
0.6250
Ext.
5/8-18 UNF
3A
0.6250
0.6163
0.5889
0.5854
0.5589
Int.
3B
0.5730
0.5650
0.5934
0.5889
0.6250
Ext.
5/8-20 UN
2A
0.6237
0.6156
0.5912
0.5869
0.5642
Int.
2B
0.5820
0.5710
0.5981
0.5925
0.6250
Ext.
5/8-20 UN
3A
0.6250
0.6169
0.5925
0.5893
0.5655
Int.
3B
0.5787
0.5710
0.5967
0.5925
0.6250
Ext.
5/8-24 UNEF
2A
0.6238
0.6166
0.5967
0.5927
0.5742
Int.
2B
0.5900
0.5800
0.6031
0.5979
0.6250
Ext.
5/8-24 UNEF
3A
0.6250
0.6178
0.5979
0.5949
0.5754
Int.
3B
0.5869
0.5800
0.6018
0.5979
0.6250
Ext.
5/8-27 UNS
2A
0.6239
0.6172
0.5998
0.5960
0.5798
Int.
2B
0.5940
0.5850
0.6059
0.6009
0.6250
Ext.
5/8-28 UN
2A
0.6239
0.6174
0.6007
0.5969
0.5813
Int.
2B
0.5950
0.5860
0.6067
0.6018
0.6250
Ext.
5/8-28 UN
3A
0.6250
0.6185
0.6018
0.5990
0.5824
Int.
3B
0.5926
0.5860
0.6055
0.6018
0.6250
Ext.
5/8-32 UN
2A
0.6239
0.6179
0.6036
0.6000
0.5867
Int.
2B
0.5990
0.5910
0.6093
0.6047
0.6250
Ext.
5/8-32 UN
3A
0.6250
0.6190
0.6047
0.6020
0.5878
Int.
3B
0.5969
0.5910
0.6082
0.6047
0.6250
Ext.
11/16-12 UN
2A
0.6859
0.6745
0.6318
0.6264
0.5867
Int.
2B
0.6150
0.5970
0.6405
0.6334
0.6875
Ext.
11/16-12 UN
3A
0.6875
0.6761
0.6334
0.6293
0.5883
Int.
3B
0.6085
0.5970
0.6387
0.6334
0.6875
Ext.
11/16-16 UN
2A
0.6861
0.6767
0.6455
0.6407
0.6116
Int.
2B
0.6340
0.6200
0.6531
0.6469
0.6875
Ext.
11/16-16 UN
3A
0.6875
0.6781
0.6469
0.6433
0.6130
Int.
3B
0.6284
0.6200
0.6515
0.6469
0.6875
Ext.
11/16-20 UN
2A
0.6862
0.6781
0.6537
0.6494
0.6267
Int.
2B
0.6450
0.6330
0.6606
0.6550
0.6875
Ext.
11/16-20 UN
3A
0.6875
0.6794
0.6550
0.6518
0.6280
Int.
3B
0.6412
0.6330
0.6592
0.6550
0.6875
Ext.
11/16-24 UNEF
2A
0.6863
0.6791
0.6592
0.6552
0.6367
Int.
2B
0.6520
0.6420
0.6656
0.6604
0.6875
Ext.
11/16-24 UNEF
3A
0.6875
0.6803
0.6604
0.6574
0.6379
Int.
3B
0.6494
0.6420
0.6643
0.6604
0.6875
Ext.
11/16-28 UN
2A
0.6864
0.6799
0.6632
0.6594
0.6438
Int.
2B
0.6570
0.6490
0.6692
0.6643
0.6875
Ext.
11/16-28 UN
3A
0.6875
0.6810
0.6643
0.6615
0.6449
Int.
3B
0.6551
0.6490
0.6680
0.6643
0.6875
Ext.
11/16-32 UN
2A
0.6864
0.6804
0.6661
0.6625
0.6492
Int.
2B
0.6610
0.6540
0.6718
0.6672
0.6875
Ext.
11/16-32 UN
3A
0.6875
0.6815
0.6672
0.6645
0.6503
Int.
3B
0.6594
0.6540
0.6707
0.6672
0.6875
Ext.
3/4-10 UNC
1A
0.7482
0.7288
0.6832
0.6744
0.6291
Int.
1B
0.6630
0.6420
0.6965
0.6850
0.7500
Ext.
3/4-10 UNC
2A
0.7482
0.7353
0.6832
0.6773
0.6291
Int.
2B
0.6630
0.6420
0.6927
0.6850
0.7500
Ext.
3/4-10 UNC
3A
0.7500
0.7371
0.6850
0.6806
0.6309
Int.
3B
0.6545
0.6420
0.6907
0.6850
0.7500
Ext.
3/4-12 UN
2A
0.7483
0.7369
0.6942
0.6887
0.6491
Int.
2B
0.6780
0.6600
0.7031
0.6959
0.7500
Ext.
3/4-12 UN
3A
0.7500
0.7386
0.6959
0.6918
0.6508
Int.
3B
0.6707
0.6600
0.7103
0.6959
0.7500
Ext.
3/4-14 UNS
2A
0.7485
0.7382
0.7021
0.6970
0.6635
Int.
2B
0.6880
0.6730
0.7103
0.7036
0.7500
Ext.
3/4-16 UNF
1A
0.7485
0.7343
0.7079
0.7004
0.6740
Int.
1B
0.6960
0.6820
0.7192
0.7094
0.7500
Ext.
3/4-16 UNF
2A
0.7485
0.7391
0.7079
0.7029
0.6740
Int.
2B
0.6960
0.6820
0.7159
0.7094
0.7500
Ext.
3/4-16 UNF
3A
0.7500
0.7406
0.7094
0.7056
0.6755
Int.
3B
0.6908
0.6820
0.7143
0.7094
0.7500
Ext.
3/4-18 UNS
2A
0.7486
0.7399
0.7125
0.7079
0.6825
Int.
2B
0.7030
0.6900
0.7199
0.7139
0.7500
Ext.
3/4-20 UNEF
2A
0.7487
0.7406
0.7162
0.7118
0.6892
Int.
2B
0.7070
0.6960
0.7232
0.7175
0.7500
Ext.
3/4-20 UNEF
3A
0.7500
0.7419
0.7175
0.7142
0.6905
Int.
3B
0.7037
0.6960
0.7218
0.7175
0.7500
Ext.
3/4-24 UNS
2A
0.7488
0.7416
0.7217
0.7176
0.6992
Int.
2B
0.7150
0.7050
0.7282
0.7229
0.7500
Ext.
3/4-27 UNS
2A
0.7488
0.7421
0.7247
0.7208
0.7047
Int.
2B
0.7190
0.7100
0.7310
0.7259
0.7500
Ext.
3/4-28 UN
2A
0.7488
0.7423
0.7256
0.7218
0.7062
Int.
2B
0.7200
0.7110
0.7318
0.7268
0.7500
Ext.
3/4-28 UN
3A
0.7500
0.7435
0.7268
0.7239
0.7074
Int.
3B
0.7176
0.7110
0.7305
0.7268
0.7500
Ext.
3/4-32 UN
2A
0.7489
0.7429
0.7286
0.7250
0.7114
Int.
2B
0.7240
0.7160
0.7344
0.7297
0.7500
Ext.
3/4-32 UN
3A
0.7500
0.7440
0.7297
0.7270
0.7128
Int.
3B
0.7219
0.7160
0.7333
0.7297
0.7500
Ext.
13/16-12 UN
2A
0.8108
0.7994
0.7567
0.7512
0.7116
Int.
2B
0.7400
0.7220
0.7656
0.7584
0.8125
Ext.
13/16-12 UN
3A
0.8125
0.8011
0.7584
0.7543
0.7133
Int.
3B
0.7329
0.7220
0.7638
0.7584
0.8125
Ext.
13/16-16 UN
2A
0.8110
0.8016
0.7704
0.7655
0.7365
Int.
2B
0.7590
0.7450
0.7782
0.7719
0.8125
Ext.
13/16-16 UN
3A
0.8125
0.8031
0.7719
0.7683
0.7380
Int.
3B
0.7533
0.7450
0.7766
0.7719
0.8125
Ext.
13/16-20 UNEF
2A
0.8112
0.8031
0.7787
0.7743
0.7517
Int.
2B
0.7700
0.7580
0.7857
0.7800
0.8125
Ext.
13/16-20 UNEF
3A
0.8125
0.8044
0.7800
0.7767
0.7530
Int.
3B
0.7662
0.7580
0.7843
0.7800
0.8125
Ext.
13/16-28 UN
2A
0.8113
0.8048
0.7881
0.7843
0.7687
Int.
2B
0.7820
0.7740
0.7943
0.7893
0.8125
Ext.
13/16-28 UN
3A
0.8125
0.8060
0.7893
0.7864
0.7699
Int.
3B
0.7801
0.7740
0.7930
0.7893
0.8125
Ext.
13/16-32 UN
2A
0.8114
0.8054
0.7911
0.7875
0.7742
Int.
2B
0.7860
0.7790
0.7969
0.7922
0.8125
Ext.
13/16-32 UN
3A
0.8125
0.8065
0.7922
0.7895
0.7753
Int.
3B
0.7844
0.7790
0.7958
0.7922
0.8125
Ext.
7/8-9 UNC
1A
0.8731
0.8523
0.8009
0.7914
0.7408
Int.
1B
0.7780
0.7550
0.8151
0.8028
0.8750
Ext.
7/8-9 UNC
2A
0.8731
0.8592
0.8009
0.7946
0.7408
Int.
2B
0.7780
0.7550
0.8110
0.8028
0.8750
Ext.
7/8-9 UNC
3A
0.8750
0.8611
0.8028
0.7981
0.7427
Int.
3B
0.7681
0.7550
0.8089
0.8028
0.8750
Ext.
7/8-10 UNS
2A
0.8732
0.8603
0.8082
0.8022
0.7542
Int.
2B
0.7880
0.7670
0.8178
0.8100
0.8750
Ext.
7/8-12 UN
2A
0.8733
0.8619
0.8192
0.8137
0.7741
Int.
2B
0.8030
0.7850
0.8281
0.8209
0.8750
Ext.
7/8-12 UN
3A
0.8750
0.8636
0.8209
0.8168
0.7758
Int.
3B
0.7948
0.7850
0.8263
0.8209
0.8750
Ext.
7/8-14 UNF
1A
0.8734
0.8579
0.8270
0.8189
0.7884
Int.
1B
0.8140
0.7980
0.8392
0.8286
0.8750
Ext.
7/8-14 UNF
2A
0.8734
0.8631
0.8270
0.8216
0.7884
Int.
2B
0.8140
0.7980
0.8356
0.8286
0.8750
Ext.
7/8-14 UNF
3A
0.8750
0.8647
0.8286
0.8245
0.7900
Int.
3B
0.8068
0.7980
0.8339
0.8286
0.8750
Ext.
7/8-16 UN
2A
0.8735
0.8641
0.8329
0.8280
0.7900
Int.
2B
0.8210
0.8070
0.8407
0.8344
0.8750
Ext.
7/8-16 UN
3A
0.8750
0.8656
0.8344
0.8308
0.8005
Int.
3B
0.8158
0.8070
0.8391
0.8344
0.8750
Ext.
7/8-18 UNS
2A
0.8736
0.8649
0.8375
0.8329
0.8075
Int.
2B
0.8280
0.8150
0.8449
0.8389
0.8750
Ext.
7/8-20 UNEF
2A
0.8737
0.8656
0.8412
0.8368
0.8142
Int.
2B
0.8320
0.8210
0.8482
0.8425
0.8750
Ext.
7/8-20 UNEF
3A
0.8750
0.8669
0.8425
0.8392
0.8155
Int.
3B
0.8287
0.8210
0.8468
0.8425
0.8750
Ext.
7/8-24 UNS
2A
0.8738
0.8666
0.8467
0.8426
0.8242
Int.
2B
0.8400
0.8300
0.8532
0.8479
0.8750
Ext.
7/8-27 UNS
2A
0.8738
0.8671
0.8497
0.8458
0.8297
Int.
2B
0.8440
0.8350
0.8560
0.8509
0.8750
Ext.
7/8-28 UN
2A
0.8738
0.8673
0.8506
0.8468
0.8312
Int.
2B
0.8450
0.8360
0.8568
0.8518
0.8750
Ext.
7/8-28 UN
3A
0.8750
0.8685
0.8518
0.8489
0.8324
Int.
3B
0.8426
0.8360
0.8555
0.8518
0.8750
Ext.
7/8-32 UN
2A
0.8739
0.8679
0.8536
0.8500
0.8367
Int.
2B
0.8490
0.8410
0.8594
0.8547
0.8750
Ext.
7/8-32 UN
3A
0.8750
0.8690
0.8547
0.8520
0.8378
Int.
3B
0.8469
0.8410
0.8583
0.8547
0.8750