| Grade of Bolt | Surface Finish | Nominal Size Inches | A563 Grade and ANSI Nut Style | |||
|---|---|---|---|---|---|---|
| Recommended | Suitable | |||||
| Hex | Heavy Hex |
Hex | Heavy Hex |
|||
| Any | 1⁄4 to 11⁄2 |
A
|
B,D,DH
|
A,B,C,D,DH,DH3
|
||
| >11⁄2 to 2 |
A
|
A
|
C,D,DH,DH3
|
|||
| >2 to 4 |
A
|
C,D,DH,DH3
|
||||
| Any | 1⁄4 to 11⁄2 |
A
|
B,D,DH
|
A,B,C,D,DH,DH3
|
||
| >11⁄2 to 2 |
A
|
A
|
||||
| >2 to 4 |
A
|
|||||
| Plain | 1⁄2 – 11⁄2 |
C
|
C3,D,DH,DH3
|
|||
| Galvanized | 1⁄2 – 11⁄2 |
DH
|
||||
| Plain | 1⁄2 – 11⁄2 |
C3
|
DH3
|
|||
| Plain | 1⁄4 to 11⁄2 |
C
|
D,DH
|
C3,D,DH,DH3
|
||
| >11⁄2 to 4 |
C
|
C3,D,DH,DH3
|
||||
| Galvanized | 1⁄4 to 11⁄2 |
DH
|
||||
| >11⁄2 to 4 |
DH
|
|||||
| Plain | 1⁄4 to 11⁄2 |
DH
|
DH
|
D,DH,DH3
|
||
| >11⁄2 to 4 |
DH
|
DH3
|
||||
| Plain | 1⁄4 to 11⁄2 |
B
|
D,DH
|
B,C,C3,D,DH,DH3
|
||
| >11⁄2 to 3 |
A
|
C,C3,D,DH,DH3
|
||||
| Galvanized | 1⁄4 to 11⁄2 |
DH
|
D,DH
|
D
|
||
| >11⁄2 to 3 |
DH
|
D
|
||||
| Plain | 1⁄2 – 11⁄2 |
DH
|
DH3
|
|||
| Plain | 1⁄2 – 11⁄2 |
DH3
|
||||
|
A687
|
Plain | 5⁄8 – 3 |
D
|
DH,DH3
|
||
| Galvanized | 5⁄8 – 3 |
DH
|
||||
| Any | 1⁄2 to 11⁄2 |
A
|
B,D,DH
|
A,B,C,D,DH,DH3
|
||
| >11⁄2 to 4 |
A
|
C,D,DH,DH3
|
||||
| Plain | 1⁄2 to 11⁄2 |
A
|
B,D,DH
|
A,B,C,D,DH,DH3
|
||
| >11⁄2 to 4 |
A
|
C,D,DH,DH3
|
||||
| Galvanized | 1⁄2 to 4 |
A
|
C,D,DH,DH3
|
|||
| Plain | 1⁄2 to 11⁄2 |
D
|
DH,DH3
|
|||
| >11⁄2 to 3 |
DH
|
DH3
|
||||
| Galvanized | 1⁄2 to 3 |
DH
|
DH3
|
|||
| 1. Nuts made in accordance with the requirements of Specification A194 Grade 2H and marked with its grade symbol are an acceptable equivalent for Grade DH nuts. (per ASTM A563/A563M-21a, Table X1.1) | ||||||