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MIL-DTL-1222 Studs, Bolts, Screws And Nuts For Applications Where A High Degree Of Reliability Is Required; General Specification ForThis specification covers standard studs, hex cap screws, and heavy hex bolts in nominal standard diameters of 1/4 inch to 4 inches, nuts in nominal standard diameters of 1/4 inch to 3 inches, and socket head cap screws in nominal standard diameters of 1/4 inch to 1 1/2 inches for submarine safety and other applications where a high degree of reliability is required \(see 6.1\).

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TABLE I.
Commercial specification, grade, material symbol and additional requirements to certify items
meeting commercial standards to this specification. - Continued
MIL-DTL-1222
Commercial
Additional requirements
Military
Fastener  3
Material
Applicable4
1
2
Grade
Form
Standard
Material
Condition
symbol
Paragraphs
Condition
ASTM
Socket
Alloy 321
3.3, 3.4,
5
A
CW
321An
321
F 837
Head Cap
or 347
3.6.4, 3.8
S2, S4
Screw
Socket
ASTM
Alloy 321
3.3, 3.4,
5
CW
347An
347
Head Cap
A
F 837
or 347
3.6.4, 3.8
Screw
S2, S4
10
T
H
410T
3.2.1, 3.3,
Socket
ASME
ASTM A493
10
3.3.1, 3.3.3,
Head Cap
410
H
HT
410H
B18.3
Grade 410
3.4, 3.6.4, 3.7
Screw
I
410I
10
T
H
416T
3.2.1, 3.3,
Socket
ASME
ASTM A493
10
3.3.1, 3.3.3,
Head Cap
416
H
HT
416H
B18.3
Grade 416
3.4, 3.6.4, 3.7
Screw
I
416I
10
T
H
416SeT
ASTM A493
3.2.1, 3.3,
Socket
ASME
10
Grade
3.3.1, 3.3.3,
416Se
Head Cap
H
HT
416SeH
B18.3
416Se
3.4, 3.6.4, 3.7
Screw
416ISe
I
10
H
H
431T
3.2.1, 3.3,
Socket
ASME
ASTM A493
10
3.3.1, 3.3.3,
431
Head Cap
HT
HT
431H
B18.3
Grade 431
3.4, 3.6.4, 3.7
Screw
I
431I
I
Bolt, Hex
As Formed or
As Formed or
ASTM
11
5
462
Cap Screw,
Stress
3.4
Cu 462
Stress
462
F 468
Relieved
or Stud
Relieved
Bolt, Hex
As Formed or
As Formed or
ASTM
11
5
464
Cu 464
464
3.4
Cap Screw,
Stress
Stress
F 468
or Stud
Relieved
Relieved
ASME
As Formed or
ASTM B 21
As Formed or
Bolt, Hex
B18.2.1
10
11
Stress
482
Alloy
Stress
3.4
482
Cap Screw,
Relieved
C48200
Relieved
or Stud
ASME B1.1
As Formed or
As Formed or
Bolt, Hex
ASTM
12
5
Cu 510
Stress
510
Stress
510
Cap Screw,
3.4
F 468
Relieved
Relieved
or Stud
ASTM B 139
Hex Cap
ASME
As Formed or
As Formed or
Alloy
Screw
B18.2.1
12
10
Stress
Stress
544
544
3.4
C54400
Relieved
Relieved
Temper
Stud
ASME B1.1
13
H04
ASTM B 150
Hex Cap
ASME
Quenched &
Quenched and
10
632
Alloy
Screw
B18.2.1
Temper
632
3.3, 3.3.5, 3.4
Tempered
C63200
Annealed
Stud
ASME B1.1



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