ASME B18.5 Round Head Bolts



Nominal Size
or Basic Bolt
Diameter
[Note (1)] 
Body Diameter, E 
Head Diameter, A 
Head Height, H 
Maximum Fillet
Radius, R
[Note (2)] 
Max.
Min. 
Max.
Min. 
Max.
Min. 
No. 10 
0.19
0.199
0.182
0.469
0.438
0.114
0.094
0.031
1/4 
0.25
0.26
0.237
0.594
0.563
0.145
0.125
0.031
5/16 
0.3125
0.324
0.298
0.719
0.688
0.176
0.156
0.031
3/8 
0.375
0.388
0.36
0.844
0.782
0.208
0.188
0.031
7/16 
0.4375
0.452
0.421
0.969
0.907
0.239
0.219
0.031
1/2 
0.5
0.515
0.483
1.094
1.032
0.27
0.25
0.031
5/8 
0.625
0.642
0.605
1.344
1.219
0.344
0.313
0.062
3/4 
0.75
0.768
0.729
1.594
1.469
0.406
0.375
0.062
7/8 
0.875
0.895
0.852
1.844
1.719
0.469
0.438
0.062
1
1.022
0.976
2.094
1.969
0.531
0.5
0.062

GENERAL NOTE: For additional requirements, refer to section 2, General Data.
NOTES:
(1) Where specifying nominal size in decimals, zeros preceding decimal and in the fourth decimal
place shall be omitted.
(2) The minimum radius is one half of the value shown.

Tags: ASME B18.5 Round Head 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