Nut Compatibility Chart

ASTM A563 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 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
A307 Grade B Any 14 to 112 A B,D,DH A,B,C,D,DH,DH3
>112 to 2 A A
>2 to 4 A
A325 Type 1 Plain 12 – 112 C C3,D,DH,DH3
Galvanized 12 – 112 DH
A325 Type 3 Plain 12 – 112 C3 DH3
A354 Grade BC 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
A354 Grade BD Plain 14 to 112 DH DH D,DH,DH3
>112 to 4 DH DH3
A449 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
A490 Type 1 Plain 12 – 112 DH DH3
A490 Type 3 Plain 12 – 112 DH3
A687 Plain 58 – 3 D DH,DH3
Galvanized 58 – 3 DH
F1554 Grade 36 Any 14 to 112 A B,D,DH A,B,C,D,DH,DH3
>112 to 4 A C,D,DH,DH3
F1554 Grade 55 Plain 14 to 112 A B,D,DH A,B,C,D,DH,DH3
>112 to 4 A C,D,DH,DH3
Galvanized 14 to 4 A C,D,DH,DH3
F1554 Grade 105 Plain 14 to 112 D DH,DH3
>112 to 3 DH DH3
Galvanized 14 to 3 DH DH3

 

ASTM A194 Nut Compatibility Chart

Grade of Bolt A194 Heavy Hex Nut Grade
A193 Grade B7 2H
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