TABLE I.
Commercial specification, grade, material symbol and additional requirements to certify items
meeting commercial standards to this specification.
MIL-DTL-1222
Commercial
Additional requirements
Material
Applicable
Military
Fastener
1
2
Material
Grade
Form
Standard
3
4
symbol
Paragraphs
Condition
Condition
Bolt, Hex
Hardened and
ASTM
Quenched and
B7
Grade B7
B7
3.3, 3.4, 3.5
Cap Screw,
Tempered
A 193
Tempered
or Stud
Bolt, Hex
Hardened and
ASTM
Quenched and
B16
Grade B16
B16
3.3, 3.4, 3.5
Cap Screw,
Tempered
A 193
Tempered
or Stud
As Formed or
Bolt, Hex
ASTM
Grade B
Stress
2
"No mark"
3.4, 3.5
Cap Screw,
A 307
Relieved
or, Stud
Bolt, Hex
3 radial
Hardened and
ASTM
5
Cap Screw,
Type 1
lines 120°
3.3, 3.4, 3.5
Tempered
A 449
or Stud
apart
Bolt, Hex
6 radial
Hardened and
ASTM
3.3, 3.4, 3.5,
Grade BD
8
Cap Screw,
lines 60°
Tempered
A 354
3.6.1.1, 3.7
or Stud
apart
Hardened and
ASTM
2H
Nut
2H
3.3, 3.5
Grade 2H
Tempered
A 194
As Formed or
2
Nut
"No mark"
3.4, 3.5
SAE J995
Grade 2
Stress
Relieved
Hardened and
ASTM
4
Nut
4
3.3, 3.5
Grade 4
Tempered
A 194
3 circum-
Hardened and
ferential
5
Nut
3.3, 3.5
SAE J995
Grade 5
marks 120°
Tempered
apart
Hardened and
ASTM
Grade 7
7
Nut
7
3.3, 3.5
Tempered
A 194
6 circum-
Hardened and
ferential
3.3, 3.5,
SAE J995
Grade 8
8
Nut
Tempered
3.6.1.1
marks 60°
apart
ASTM
Socket
Hardened and
3.3, 3.4, 3.5,
A 574
Head Cap
A574
No mark
Tempered
3.6.1.1, 3.7
S1
Screw
ASTM
Socket
3.3, 3.4, 3.5,
Hardened and
5
A 574
Head Cap
Grade 4340
4340
4340
3.6.1.1, 3.7
Tempered
S1
Screw
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