Portland Bolt Expands with Acquisition of Bennett Bolt Works
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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)
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