ASME B18.2.1 Hex Bolts and Heavy Hex Bolts



Dimensions of ASME B18.2.1 Hex Bolts
 
Thread Length for
Body Bolt Lengths, LT
See Para. 3.7)
Nominal Size
or Basic Product Diameter
Full-Size Body Diameter,E
(See Paras. 3.4 and 3.5)
Width Across Flats, F (See Para. 2.1.2)
Width Across Corners, G
Head Height, H
Radius of Fillet, R
6 in. and Shorter
Over 6 in.
Max.
Min.
Basic
Max.
Min.
Max.
Min.
Basic
Max.
Min.
Max.
Min.
Nom.
Nom.
1/4
0.25
0.26
0.237
7/16
0.438
0.425
0.505
0.484
11/64
0.188
0.15
0.03
0.01
0.75
1
5/16
0.3125
0.324
0.298
1/2
0.5
0.484
0.577
0.552
7/32
0.235
0.195
0.03
0.01
0.875
1.125
3/8
0.375
0.388
0.36
9/16
0.562
0.544
0.65
0.62
1/4
0.268
0.226
0.03
0.01
1
1.25
7/16
0.4375
0.452
0.421
5/8
0.625
0.603
0.722
0.687
19/64
0.316
0.272
0.03
0.01
1.125
1.375
1/2
0.5
0.515
0.482
3/4
0.75
0.725
0.866
0.826
11/32
0.364
0.302
0.03
0.01
1.25
1.5
5/8
0.625
0.642
0.605
15/16
0.938
0.906
1.083
1.033
27/64
0.444
0.378
0.06
0.02
1.5
1.75
3/4
0.75
0.768
0.729
1 1/8
1.125
1.088
1.299
1.24
1/2
0.524
0.455
0.06
0.02
1.75
2
7/8
0.875
0.895
0.852
1 5/16
1.312
1.269
1.516
1.447
37/64
0.604
0.531
0.06
0.02
2
2.25
1
1
1.022
0.976
1 1/?2
1.5
1.45
1.732
1.653
43/64
0.7
0.591
0.09
0.03
2.25
2.5
1 1/8
1.125
1.149
1.098
1 11/16
1.688
1.631
1.949
1.859
3/4
0.78
0.658
0.09
0.03
2.5
2.75
1 1/4
1.25
1.277
1.223
1 7/8
1.875
1.812
2.165
2.066
27/32
0.876
0.749
0.09
0.03
2.75
3
1 3/8
1.375
1.404
1.345
2 1/16
2.062
1.994
2.382
2.273
29/32
0.94
0.81
0.09
0.03
3
3.25
1 1/2
1.5
1.531
1.47
2 1/4
2.25
2.175
2.598
2.48
1
1.036
0.902
0.09
0.03
3.25
3.5
1 5/8
1.625
1.658
1.591
2 7/16
2.438
2.356
2.815
2.616
1 3/32
1.116
0.978
0.09
0.03
3.5
3.75
1 3/4
1.75
1.785
1.716
2 5/8
2.625
2.538
3.031
2.893
1 5/32
1.196
1.054
0.12
0.04
3.75
4
1 7/8
1.875
1.912
1.839
2 13/16
2.812
2.719
3.248
3.099
1 1/4
1.276
1.13
0.12
0.04
4
4.25
2
2
2.039
1.964
3
3
2.9
3.464
3.306
1 11/32
1.388
1.175
0.12
0.04
4.25
4.5
2 1/4
2.25
2.305
2.214
3 3/8
3.375
3.262
3.897
3.719
1 1/2
1.548
1.327
0.19
0.06
4.75
5
2 1/2
2.5
2.559
2.461
3 3/4
3.75
3.625
4.33
4.133
1 21/32
1.708
1.479
0.19
0.06
5.25
5.5
2 3/4
2.75
2.827
2.711
4 1/8
4.125
3.988
4.763
4.546
1 13/16
1.869
1.632
0.19
0.06
5.75
6
3
3
3.081
2.961
4 1/2
4.5
4.35
5.196
4.959
2
2.06
1.815
0.19
0.06
6.25
6.5
3 1/4
3.25
3.335
3.21
4 7/8
4.875
4.712
5.629
5.372
2 3/16
2.251
1.936
0.19
0.06
6.75
7
3 1/?2
3.5
3.589
3.461
5 1/4
5.25
5.075
6.062
5.786
2 5/16
2.38
2.057
0.19
0.06
7.25
7.5
3 3/4
3.75
3.858
3.726
5 5/8
5.625
5.437
6.495
6.198
2 1/2
2.572
2.241
0.19
0.06
7.75
8
4
4
4.111
3.975
6
6
5.8
6.928
6.612
2 11/16
2.764
2.424
0.19
0.06
8.25
8.5

Tags: ASME B18.2.1 Hex Bolts Heavy Hex Bolts

General Material:Stainless Steel,Nickel Alloy,Silicon Bronze,Aluminium Bronze,Brass,Naval Brass,Coppe,Copper-Nickel,Aluminum Alloy,Titanium,Alloy Steel,Such as C1008,C1018,C1022,C1035,C1045,40cr,SCM435,35crmoA,42crmoA,AISI4140SS304/A2-70,SS316/A4-80,SS310s,SS309,SS321,SS410,SS317,SS904L,17-4 PH/630,Duplex 2205,Duplex 31803,Nitronic 40,Nitronic 50,Nitronic 60,Nickel Alloy,Hastelloy C276,Inconel 600,Inconel 601,Inconel 625,Inconel 718,Inconel X750,Inconel 800H,Inconel 825,Monel 400,Monel 405,Monel K-500,MP35N,Nickel 200,Nickel 201,Waspaloy)C65500,C64200,C61400,C63000,C63200,C46200,H59,H62,H67,C46400,C11000,90/10 C70600,70/30 C71500,6061-T6,2024-T4,Ti-6Al-4V Grade 5,ASTM B348 Grade 2,ASTM B348 Grade 7,651/S63198
General Surface Finish:Blackoxide,Zinc,Dacromet 500/Dacromet 320,Non-electrolytically Deposited Zinc Flake,Hot-dip Galvanization,Phosphating,Passviation