| Nut Compatibility Chart | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Grade of Bolt |
Surface Finish |
Nominal Size Inches |
A563 Grade and ANSI Nut Style |
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|
Recommended |
Suitable | |||||||||
|
Hex |
Heavy Hex |
Hex |
Heavy Hex |
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| A307 Grade A & C | Any | 1 1/4 to 1 1/2 | A | B,D,DH | A,B,C,D,DH,DH3 | |||||
| > 1 1/2 to 2 | A | A | C,D,DH,DH3 | |||||||
| >2 to 4 | A | C,D,DH,DH3 | ||||||||
| A307 Grade B | Any | 1/4 to 1 1/2 | A | B,D,DH | A,B,C,D,DH,DH3 | |||||
| >1 1/2 to 2 | A | A | ||||||||
| >2 to 4 | A | |||||||||
| A325 Type 1 | Plain | 1/2 - 1 1/2 |
C | C3,D,DH,DH3 | ||||||
| Galvanized | 1/2 - 1 1/2 | DH | ||||||||
| A325 Type 3 | Plain | 1/2 - 1 1/2 | C3 | DH3 | ||||||
| A354 Grade BC | Plain | 1/4 to 1 1/2 |
C | D,DH | C3,D,DH,DH3 | |||||
| >1 1/2 to 4 | C | C3,D,DH,DH3 | ||||||||
| Galvanized | 1/4 to 1 1/2 | DH | ||||||||
| >1 1/2 to 4 | DH | |||||||||
| A354 Grade BD | Plain | 1/4 to 1 1/2 |
DH | DH | D,DH,DH3 | |||||
| > 1 1/2 to 4 | DH | DH3 | ||||||||
| A449 | Plain | 1/4 to 1 1/2 |
B | D, DH | B,C,C3,D,DH,DH3 | |||||
| >1 1/2 to 3 | A | C,C3,D,DH,DH3 | ||||||||
| Galvanized | 1/4 to 1 1/2 | DH | D, DH | D | ||||||
| >1 1/2 to 3 | DH | D | ||||||||
| A490 Type 1 | Plain | 1/2 - 1 1/2 | DH | DH3 | ||||||
| A490 Type 3 | Plain | 1/2 - 1 1/2 | DH3 | |||||||
| A687 | Plain | 5/8 - 3 | D | DH,DH3 | ||||||
| Galvanized | 5/8 - 3 | DH | ||||||||
| F1554 Grade 36 | Any | 1/2 to 1 1/2 | A | B, D, DH | A,B,C,D,DH,DH3 | |||||
| >1 1/2 to 4 | A | C,D,DH,DH3 | ||||||||
| F1554 Grade 55 | Plain | 1/2 to 1 1/2 | A | B, D, DH | A,B,C,D,DH,DH3 | |||||
| >1 1/2 to 4 | A | C,D,DH,DH3 | ||||||||
| Galvanized | 1/2 to 4 | A | C,D,DH,DH3 | |||||||
| F1554 Grade 105 | Plain | 1/2 to 1 1/2 | D | DH,DH3 | ||||||
| >1 1/2 to 3 | DH | DH3 | ||||||||
| Galvanized | 1/2 to 3 | DH | DH3 | |||||||
| In nominal sizes 3/4" and larger, the availability of A563 grade DH nuts is very limited and generally only available on special orders of 50,000 or more. ASTM A194 grade 2H should be regarded for lower amounts. |
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|
ASTM A194 Nut Compatibility Chart |
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|
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 grades of Class 2 in stainless steel, strain-hard nuts are available as an additional requirement. |
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