Nut Compatibility Chart
| Grade of Bolt | Surface Finish | Nominal Size Inches | A563 Grade and ANSI Nut Style | |||
|---|---|---|---|---|---|---|
| Recommended | Suitable | |||||
| Hex | Heavy Hex | Hex | Heavy Hex | |||
|
A307 Grade A & C
|
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
|
||||
|
A307 Grade B
|
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
|
|||||
|
F3125 A325 Type 1
|
Plain | 1⁄2 - 11⁄2 |
C
|
C3,D,DH,DH3
|
||
| Galvanized | 1⁄2 - 11⁄2 |
DH
|
||||
|
F3125 A325 Type 3
|
Plain | 1⁄2 - 11⁄2 |
C3
|
DH3
|
||
|
A354 Grade BC
|
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
|
|||||
|
A354 Grade BD
|
Plain | 1⁄4 to 11⁄2 |
DH
|
DH
|
D,DH,DH3
|
|
| >11⁄2 to 4 |
DH
|
DH3
|
||||
|
A449
|
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
|
||||
|
F3125 A490 Type 1
|
Plain | 1⁄2 - 11⁄2 |
DH
|
DH3
|
||
|
F3125 A490 Type 3
|
Plain | 1⁄2 - 11⁄2 |
DH3
|
|||
|
A687
|
Plain | 5⁄8 - 3 |
D
|
DH,DH3
|
||
| Galvanized | 5⁄8 - 3 |
DH
|
||||
|
F1554 Grade 36
|
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
|
||||
|
F1554 Grade 55
|
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
|
|||
|
F1554 Grade 105
|
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) | ||||||
ASTM A194 Nut Compatibility Chart
| Grade of Bolt | A194 Heavy Hex Nut Grade |
|---|---|
| A193 Grade B7 | 2H or 4 or 7 |
| A193 Grade B8 (Class 1 and 2) | 8 |
| A193 Grade B8M (Class 1 and 2) | 8M |
| A320 Grade L7 | 4 or 7 |
| A320 Grade B8 (Class 1 and 2) | 8 |
| A320 Grade B8M (Class 1 and 2) | 8M |
| A320 Grade B8C | 8C |
| A320 Grade B8T | 8T |
| A320 Grade B8LN | 8LN |
| A320 Grade B8MLN | 8MLN |
| For Class 2 stainless steel grades, strain hardened nuts available as a supplementary requirement | |
