Nominal nut size

in.Non-Zinc

coated NutsZinc coated

Nuts

hex 1/4 to 1-1/2 90 68 /

heavy hex 1/4 to 4 /

hex thick 1/4 to 1-1/2 /

1/4 to 1 120 90 /

1-1/8 to 1-1/2 105 79 /

1/4 to 1 133 100 /

1-1/8 to 1-1/2 116 87 /

C/C3 HRB78-HRC38 heavy hex 1/4 to 4 144 144

hex 1/4 to 1-1/2 135 135

heavy hex 1/4 to 4 150 150

hex thick 1/4 to 1-1/2 150 150

hex 1/4 to 1-1/2 150 150

heavy hex 1/4 to 4 175 175

hex thick 1/4 to 1-1/2 175 175

DH3 HRC24-HRC38 heavy hex 1/4 to 4 175 175

ASTM A563 Mechanical Properties and Head Marking

A563

HRC24-HRC38

D HRB84-HRC38

A

Dimensional styleof nut

B

HRB68-HRC32

HRB69-HRC32

DH

Standard forNut

Grade

Proof Load Stresskis

100 75

Hardness

hex

Head Marking

heavy hex and hexthick