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
Any 14 to 112
A
B,D,DH
A,B,C,D,DH,DH3
>112 to 2
A
A
C,D,DH,DH3
>2 to 4
A
C,D,DH,DH3
Any 14 to 112
A
B,D,DH
A,B,C,D,DH,DH3
>112 to 2
A
A
>2 to 4
A
Plain 12 – 112
C
C3,D,DH,DH3
Galvanized 12 – 112
DH
Plain 12 – 112
C3
DH3
Plain 14 to 112
C
D,DH
C3,D,DH,DH3
>112 to 4
C
C3,D,DH,DH3
Galvanized 14 to 112
DH
>112 to 4
DH
Plain 14 to 112
DH
DH
D,DH,DH3
>112 to 4
DH
DH3
Plain 14 to 112
B
D,DH
B,C,C3,D,DH,DH3
>112 to 3
A
C,C3,D,DH,DH3
Galvanized 14 to 112
DH
D,DH
D
>112 to 3
DH
D
Plain 12 – 112
DH
DH3
Plain 12 – 112
DH3
A687
Plain 58 – 3
D
DH,DH3
Galvanized 58 – 3
DH
Any 12 to 112
A
B,D,DH
A,B,C,D,DH,DH3
>112 to 4
A
C,D,DH,DH3
Plain 12 to 112
A
B,D,DH
A,B,C,D,DH,DH3
>112 to 4
A
C,D,DH,DH3
Galvanized 12 to 4
A
C,D,DH,DH3
Plain 12 to 112
D
DH,DH3
>112 to 3
DH
DH3
Galvanized 12 to 3
DH
DH3
1. Nuts made in accordance with the requirementes of Specification A194 Grade 2H and marked with its grade symbol are an accpetable equivalent for Grade DH nuts. (per ASTM A563/A563M-21a, Table X1.1)