TABLE IV.
Mechanical property values for nuts.
Heat treatment or
Nominal size
Proof stress for
1
Rockwell hardness
Material
condition
(inches)
hex nut (ksi min)
As Formed or Stress
2
2
B80 C32
All sizes
90
Relieved
Hardened and
2H
All sizes
150
C24 - C38
tempered
Carbon
Hardened and
and alloy
4,7
All sizes
150
C24 - C38
tempered
steels
Up to 1"
120
C23 C32
Hardened and
5
tempered
3
Over 1"
105
B97 C32
5
Up to /"
150
C24 C32
Hardened and
8
8
5
4
5
tempered
Over /"
150
C24 C32
8
Annealed
All
75
B65 B95
384, 316,, 321,
5
Cold Worked (CW1)
Up to /"
90
B95
347, 304 305
8
6
6
Cold worked (CW2)
¾ and over
90
B90 - C32
6
6
7
T
All sizes
125
C25 34
410, 416,
Corrosion
416Se
6
6
7
resistant
C38 47
H
All sizes
180
steels
7
H
All sizes
125
C25 C34
431
8
5
C38 47
HT
All sizes
180
Annealed and age
630
All sizes
135
C28 C38
hardened
As formed or stress
6
462, 464
All sizes
55
relieved
As formed or stress
All sizes
60
510, 544
relieved
Quenched and
9
9
632
All sizes
90
tempered
As formed or stress
6
Copper
All sizes
65
655
relieved
As formed or stress
8
661
All sizes
65
relieved
As formed or stress
9
9
670
All sizes
55
relieved
As formed or stress
675
All sizes
55
relieved
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