Grade of Bolt |
Surface Finish |
Nominal Size Inches |
A563 Grade and ANSI Nut Style |
|||
Recommended |
Suitable |
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Hex |
Heavy Hex |
Hex |
Heavy Hex |
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A307 Grade A & C |
Any |
¼ to 1½ |
A |
|
B,D,DH |
A,B,C,D,DH,DH3 |
>1½ to 2 |
|
A |
A |
C,D,DH,DH3 |
||
>2 to 4 |
|
A |
|
C,D,DH,DH3 |
||
A307 Grade B |
Any |
¼ to 1½ |
|
A |
B,D,DH |
B,C,D,DH,DH3 |
>1½ to 2 |
|
A |
A |
|
||
>2 to 4 |
|
A |
|
|
||
A325 Type 1 |
Plain |
½ - 1½ |
|
C |
|
C3,D,DH,DH3 |
Galvanized |
½ - 1½ |
|
DH |
|
|
|
A325 Type 3 |
Plain |
½ - 1½ |
|
C3 |
|
DH3 |
A354 Grade BC |
Plain |
¼ to 1½ |
|
C |
D,DH |
C3,D,DH,DH3 |
>1½ to 4 |
|
C |
|
C3,D,DH,DH3 |
||
Galvanized |
¼ to 1½ |
|
DH |
|
|
|
>1½ to 4 |
|
DH |
|
|
||
A354 Grade BD |
Plain |
¼ to 1½ |
|
DH |
DH |
D,DH,DH3 |
>1½ to 4 |
|
DH |
|
DH3 |
||
A449 |
Plain |
¼ to 1½ |
B |
|
D,DH |
B,C,C3,D,DH,DH3 |
>1½ to 3 |
|
A |
|
C,C3,D,DH,DH3 |
||
Galvanized |
¼ to 1½ |
|
DH |
D,DH |
D |
|
>1½ to 3 |
|
DH |
|
D |
||
A490 Type 1 |
Plain |
½ - 1½ |
|
DH |
|
DH3 |
A490 Type 3 |
Plain |
½ - 1½ |
|
DH3 |
|
|
A687 |
Plain |
⅝ - 3 |
|
D |
|
DH,DH3 |
Galvanized |
⅝ - 3 |
|
DH |
|
|
|
F1554 Grade 36 |
Any |
¼ to 1½ |
A |
|
B,D,DH |
A,B,C,D,DH,DH3 |
>1½ to 4 |
|
A |
|
C,D,DH,DH3 |
||
F1554 Grade 55 |
Plain |
¼ to 1½ |
A |
|
B,D,DH |
A,B,C,D,DH,DH3 |
>1½ to 4 |
|
A |
|
C,D,DH,DH3 |
||
Galvanized |
¼ to 4 |
|
A |
|
C,D,DH,DH3 |
|
F1554 Grade 105 |
Plain |
¼ to 1½ |
D |
|
|
DH,DH3 |
>1½ to 3 |
|
DH |
|
DH3 |
||
Galvanized |
¼ to 3 |
|
DH |
|
DH3 |
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