|
Specification
|
Fastener
Description
|
Material
|
Nominal
Size
Range (in.)
|
Mechanical
Properties
|
|
Proof
Load
(psi)
|
Yield
Strength
Min (psi)
|
Tensile
Strength
Min (psi)
|
|
SAE
J429
Grade 1
|
Bolts,
Screws,
Studs
|
Low
or Medium Carbon Steel
|
1/4
thru 1-1/2
|
33,000
|
36,000
|
60,000
|
|
ASTM
A307
Grades A&B
|
Low
Carbon Steel
|
1/4
thru 4
|
--
|
--
|
|
SAE
J429
Grade 2
|
Low
or Medium Carbon Steel
|
1/4
thru 3/4 Over 3/4 to 1-1/2
|
55,000
33,000
|
57,000
36,000
|
74,000
60,000
|
|
SAE
J429
Grade 4
|
Studs
|
Medium
Carbon Cold Drawn Steel
|
1/4
thru 1-1/2
|
--
|
100,000
|
115,000
|
|
ASTM
A193
Grade B5
|
|
AISI
501
|
1/4
Thru 4
|
--
|
80,000
|
100,000
|
|
ASTM
A193
Grade B6
|
AISI
410
|
85,000
|
110,000
|
|
ASTM
A193
Grade B7
|
AISI
4140, 4142, OR 4105
|
1/4
thru 2-1/2
Over 2-1/2 thru 4
Over 4 thru 7
|
--
--
--
|
105,000
95,000
75,000
|
125,000
115,000
100,000
|
|
ASTM
A193
Grade B16
|
CrMoVa
Alloy Steel
|
105,000
95,000
85,000
|
125,000
115,000
100,000
|
|
ASTM
A193
Grade B8
|
AISI
304
|
1/4
and larger
|
--
|
30,000
|
75,000
|
|
ASTM
A193
Grade B8C
|
AISI
347
|
|
ASTM
A193
Grade B8M
|
AISI
316
|
|
ASTM
A193
Grade B8T
|
Bolts,
Screws,
Studs for High-Temperature Service
|
AISI
321
|
1/4
and larger
|
--
|
30,000
|
75,000
|
|
ASTM
A193
Grade B8
|
AISI
304
Strain Hardened
|
1/4
thr 3/4
Over 3/4 thru 1
Over 1 thru 1-1/4
Over 1-1/4 thru 1-1/2
|
--
--
--
--
|
100,000
80,000
65,000
50,000
|
125,000
115,000
105,000
100,000
|
|
ASTM
A193
Grade B8C
|
AISI
347
Strain Hardened
|
|
ASTM
A193
Grade B8M
|
AISI
316
Strain Hardened
|
95,000
80,000
65,000
50,000
|
110,000
100,000
95,000
90,000
|
|
ASTM
A193
Grade B8T
|
AISI
321
Strain Hardened
|
100,000
80,000
65,000
50,000
|
125,000
115,000
105,000
100,000
|
|
ASTM
A320
Grade L7
|
Bolts,
Screws,
Studs for Low-Temperature Service
|
AISI
4140,
4142 or 4145
|
1/4
thru 2-1/2
|
--
|
105,000
|
125,000
|
|
ASTM
A320
Grade L7A
|
AISI
4037
|
|
ASTM
A320
Grade L7B
|
AISI
4137
|
|
ASTM
A320
Grade LC7
|
AISI
8740
|
|
ASTM
A320
Grade L43
|
AISI
4340
|
1/4
thru 4
|
--
|
105,000
|
125,000
|
|
ASTM
A320
Grade B8
|
Bolts,
Screws,
Studs for Low-Temperature Service
|
AISI
304
|
1/4
and larger
|
--
|
30,000
|
75,000
|
|
ASTM
A320
Grade B8C
|
AISI
347
|
|
ASTM
A320
Grade B8T
|
AISI
321
|
|
ASTM
A320
Grade B8F
|
AISI
303
or 303Se
|
|
ASTM
A320
Grade B8M
|
AISI
316
|
|
ASTM
A320
Grade B8
|
AISI
304
|
1/4
thru 3/4
Over 3/4 thru 1
Over 1 thru 1-1/4
Over 1-1/4 thru 1-1/2
|
--
--
--
--
|
100,000
80,000
65,00
50,00
|
100,000
80,000
65,00
50,00
|
|
ASTM
A320
Grade B8C
|
AISI
347
|
|
ASTM
A320
Grade B8F
|
AISI
303
or 303Se
|
|
ASTM
A320
Grade B8M
|
AISI
316
|
|
ASTM
A320
Grade B8T
|
AISI
321
|
|
SAE
J429
Grade 5
|
Bolts,
Screws,
Studs
|
Medium
Carbon Steel, Quenched and Tempered
|
1/4
thru 1
Over 1 to 1-1/2
|
85,000
74,000
|
92,000
81,000
|
120,000
105,000
|
|
ASTM
A449
|
1/4
thru 1
Over 1 to 1-1/2
Over 1-1/2 thru 3
|
85,000
74,000
55,000
|
92,000
81,000
58,000
|
120,000
105,000
90,000
|
|
SAE
J429
Grade 5.1
|
Sems
|
Low
or Medium Carbon Steel, Quenched and Tempered
|
No.
6
thru 3/8
|
85,000
|
--
|
120,000
|
|
SAE
J429
Grade 5.2
|
Bolts,
Screws,
Studs
|
Low
Carbon Martensitic Steel, Quenched and Tempered
|
1/4
thru 1
|
85,000
|
92,000
|
120,000
|
|
ASTM
A325
Type 1
|
High
Strength
Structural Bolts
|
Medium
Carbon Steel, Quenched and Tempered
|
1/2
thru 1
1-1/8 thru 1-1/2
|
85,000
74,000
|
92,000
81,000
|
120,000
105,000
|
|
ASTM
A325
Type 2
|
Low
Carbon Martensitic Steel, Quenched and Tempered
|
1/2
thru 1
|
85,000
|
92,000
|
120,000
|
|
ASTM
A325
Type 3
|
Atmospheric
Corrosion Resisting Steel, Quenched and Tempered
|
1/2
thru 1
1-1/8 thru 1-1/2
|
85,000
74,000
|
92,000
81,000
|
120,000
105,000
|
|
ASTM
A354
Grade BB
|
Bolts,
Studs
|
Alloy
Steel, Quenched and Tempered
|
1/4
thru 2-1/2
2-3/4 thru 4
|
80,000
75,000
|
83,000
78,000
|
105,000
100,000
|
|
ASTM
A354
Grade BC
|
105,000
95,000
|
109,000
99,000
|
125,000
115,000
|
|
SAE
J429
Grade 7
|
Bolts,
Screws,
|
Medium
Carbon Alloy Steel, Quenched and Tempered 4
|
1/4
thru 1-1/2
|
105,000
|
115,000
|
133,000
|
|
SAE
J429
Grade 8
|
Bolts,
Screws,
Studs
|
Medium
Carbon Alloy Steel, Quenched and Tempered
|
1/4
thru 1-1/2
|
120,000
|
130,000
|
150,000
|
|
ASTM
A354
Grade BD
|
Alloy
Steel, Quenched and Tempered 4
|
|
SAE
J429
Grade 8.1
|
Studs
|
Medium
Carbon Alloy or SAE 1041 Modified Elevated Temperature Drawn Steel
|
1/4
thru 1-1/2
|
120,000
|
130,000
|
150,000
|
|
ASTM
A490
|
High
Strength Structural Bolts
|
Alloy
Steel, Quenched and Tempered
|
1/2
thru 1-1/2
|
120,000
|
130,000
|
150,000
min
170,000 max
|
|
ISO
R898
Class 4.6
|
Bolts,
Screws,
Studs
|
Medium
Carbon Steel, Quenched and Tempered
|
All
Sizes
thru 1-1/2
|
33,000
|
36,000
|
60,000
|
|
ISO
R898
Class 5.8
|
55,000
|
57,000
|
74,000
|
|
ISO
R898
Class 8.8
|
Alloy
Steel, Quenched and Tempered
|
85,000
|
92,000
|
120,000
|
|
ISO
R898
Class 10.9
|
120,000
|
130,000
|
150,000
|
FASTENER IDENTIFICATION MARKING
|
Specification
|
Material
|
Nominal
Size
In.
|
Proof
Load
Stress
ksi
|
Hardness
Rockwell
|
See
Note
|
|
Min
|
Max
|
|
ASTM
A563 - Grade 0
|
Carbon
Steel
|
1/4
thru 1-1/2
|
69
|
B55
|
C32
|
3,4
|
|
ASTM
A563 - Grade A
|
Carbon
Steel
|
1/4
thru 1-1/2
|
90
|
B68
|
C32
|
3,4
|
|
ASTM
A563 - Grade B
|
Carbon
Steel
|
1/4
thru 1
|
120
|
B69
|
C32
|
3,4
|
|
over
1 thru 1-1/2
|
105
|
|
ASTM
A563 - Grade C
|
Carbon
Steel
May be Quenched
and Tampered
|
1/4
thru 4
|
144
|
B78
|
C38
|
5
|
|
ASTM
A563 - Grade C3
|
Atmospheric
Corrosion
Resistant Steel
May be Quenched
and Tampered
|
1/4
thru 4
|
144
|
B78
|
C38
|
5,9
|
|
ASTM
A563 - Grade D
|
Carbon
Steel
May be Quenched
and Tampered
|
1/4
thru 4
|
150
|
B84
|
C38
|
6
|
|
ASTM
A563 - Grade DH
|
Carbon
Steel
Quenched
and Tampered
|
1/4
thru 4
|
175
|
C24
|
C38
|
6
|
|
ASTM
A563 - Grade DH3
|
Atmospheric
Corrosion
Resistant Steel,
Quenched
and Tampered
|
1/4
thru 4
|
175
|
C24
|
C38
|
5,9
|
|
ASTM
A194 - Grade 1
|
Carbon
Steel
|
1/4
thru 4
|
130
|
B70
|
--
|
7
|
|
ASTM
A194 - Grade 2
|
Medium
Carbon
Steel
|
1/4
thru 4
|
150
|
159
|
352
|
7,8
|
|
ASTM
A194 - Grade 2H
|
Medium
Carbon
Steel, Quenched
and Tempered
|
1/4
thru 4
|
175
|
C24
|
C38
|
7
|
|
ASTM
A194 - Grade 2HM
|
Medium
Carbon
Steel, Quenched
and Tempered
|
1/4
thru 4
|
150
|
159
|
237
|
7,8
|
|
ASTM
A194 - Grade 4
|
Medium
Carbon
Alloy Steel,
Quenched
and Tempered
|
1/4
thru 4
|
175
|
C24
|
C38
|
7
|
|
ASTM
A194 - Grade 7
|
Medium
Carbon
Alloy Steel,
Quenched
and Tempered
|
1/4
thru 4
|
175
|
C24
|
C38
|
7
|
|
ASTM
A194 - Grade 7M
|
Medium
Carbon
Alloy Steel,
Quenched
and Tempered
|
1/4
thru 4
|
150
|
159
|
237
|
7
|
|
10
|
|
|
|
|
|
|
NOTES:
1. In addition to the indicated grade marking, all grades, except A563 grades O, A and B, must be marked for manufacturer identification.
2. The markings shown for all grades of A194 nuts are for cold formed and hot forged nuts. When nuts are machined from bar stock the nut must be additionally marked with the letter 'B'.
3. Nuts are not required to be marked unless specified by the purchaser. When marked, the identification marking shall be the grade letter O, A or B.
4. Properties shown are those of nonplated or noncoated coarse thread hex nuts.
5. Properties shown are those of coarse thread heavy hex nuts.
6. Properties shown are those of coarse thread heavy hex nuts.
7. Properties shown are those of coarse 8-pitch thread heavy hex nuts.
8. Hardnesses are Brinell Hardness Numbers.
9. The nut manufacturer, at his option, may add other markings to indicate the use of atmospheric corrosion resistant steel.
10. Specifications --
ASTM A563 -- Carbon and Alloy Steel Nuts.
ASTM A194/A194M -- Carbon and Alloy Steel Nuts for Bolts for High Pressure and High Temperature Service.
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