Nut Compatibility Chart

Technical Menu Posted on July 2nd, 2015 by vapro

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 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
A325 Type 1 Plain 1⁄2 – 11⁄2 C C3,D,DH,DH3
Galvanized 1⁄2 – 11⁄2 DH
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
A490 Type 1 Plain 1⁄2 – 11⁄2 DH DH3
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 1⁄4 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 1⁄4 to 11⁄2 A B,D,DH A,B,C,D,DH,DH3
>11⁄2 to 4 A C,D,DH,DH3
Galvanized 1⁄4 to 4 A C,D,DH,DH3
F1554 Grade 105 Plain 1⁄4 to 11⁄2 D DH,DH3
>11⁄2 to 3 DH DH3
Galvanized 1⁄4 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

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