|
|
|
Fastener Identification Marking
for Nuts
|
|
|
|
|
Grade
Identification
Marking
|
Specification
|
Material
|
Nominal Size In.
|
Proof
Load
Stress
ksi
|
Hardness
Rockwell
|
|
Min
|
Max
|
|
|
ASTM A194
Grade 2
|
Medium
Carbon
Steel
|
1/4 thru 4
|
150
|
159
|
352
|
|
|
ASTM A194
Grade 2H
|
Medium
Carbon Steel, Quenched and Tempered
|
1/4
thru 4
|
175
|
C24
|
C38
|
|
|
ASTM A194
Grade 2HM
|
Medium
Carbon Steel, Quenched and Tempered
|
1/4
thru 4
|
150
|
159
|
237
|
|
|
ASTM A194
Grade
4
|
Medium
Carbon Steel, Quenched and Tempered
|
1/4
thru 4
|
175
|
C24
|
C38
|
|
|
ASTM A194
Grade 7
|
Medium
Carbon Steel, Quenched and Tempered
|
1/4
thru 4
|
175
|
C24
|
C38
|
|
|
ASTM A194
Grade 7M
|
Medium
Carbon Steel, Quenched and Tempered
|
1/4
thru 4
|
150
|
159
|
237
|
|
|
|
