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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)] |
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Max. |
Min. |
Max. |
Min. |
Max. |
Min. |
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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 |
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 specif ying nominal size in decimals, zeros preceding decimal and in the four th decimal
place shall be omitted.
(2) The minimum radius is one half of the value shown.
NOTES:
(1) Where specif ying nominal size in decimals, zeros preceding decimal and in the four th decimal
place shall be omitted.
(2) The minimum radius is one half of the value shown.
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