|
|
|
Fastener Identification Marking
for Nuts
|
|
|
|
|
Grade
Identification
Marking
|
Specification
|
Material
|
Nominal Size In.
|
Proof
Load
Stress
ksi
|
Hardness
Rockwell
|
|
Min
|
Max
|
|
|
ASTM A563
Grade 0
|
Carbon Steel
|
1/4 thru 1 1/2
|
69
|
B55
|
C32
|
|
ASTM A563
Grade A
|
Carbon Steel
|
1/4 thru 1 1/2
|
90
|
B69
|
C32
|
|
ASTM A563
Grade B
|
Carbon Steel
|
1/4 thru 1
|
120
|
B69
|
C32
|
|
over
1
thru 1 1/2
|
105
|
|
|
ASTM A563
Grade C
|
Carbon
Steel, Quenched and Tempered
|
1/4
thru 4
|
144
|
B78
|
C38
|
|
|
ASTM A563
Grade C3
|
Atmospheric
Corrosioin Resistant Steel, Quenched and Tempered
|
1/4
thru 4
|
144
|
B78
|
C38
|
|
|
ASTM A563
Grade D
|
Carbon
Steel, Quenched and Tempered
|
1/4
thru 4
|
150
|
B84
|
C38
|
|
|
ASTM A563
Grade DH
|
Carbon Steel, Quenched and Tempered
|
1/4
thru 4
|
175
|
C24
|
C38
|
|
|
ASTM A563
Grade DH3
|
Atmospheric
Corrosioin Resistant Steel, Quenched and Tempered
|
1/4
thru 4
|
175
|
C24
|
C38
|
|
|
ASTM A563
Grade 1
|
Carbon
Steel
|
1/4
thru 4
|
130
|
B70
|
--
|
|
|
|
