 
|
Identification
Grade Mark
|
Specification
|
Fastener
Description
|
Material
|
Nominal Size
Range (in.)
|
Mechanical Properties
|
|
Proof Load
(psi)
|
Yield Strength
Min (psi)
|
Tensile Strength
Min (psi)
|
|
No
Grade
Mark
|
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
|
|
No
Grade
Mark
|
SAE J429
Grade 4
|
Studs
|
Medium Carbon Cold Drawn Steel
|
1/4 thru 1-1/2
|
--
|
100,000
|
115,000
|
|
B5
|
ASTM A193
Grade B5
|
|
AISI 501
|
1/4 Thru 4
|
--
|
80,000
|
100,000
|
|
B6
|
ASTM A193
Grade B6
|
AISI 410
|
85,000
|
110,000
|
|
B7
|
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
|
|
B16
|
ASTM A193
Grade B16
|
CrMoVa Alloy Steel
|
105,000
95,000
85,000
|
125,000
115,000
100,000
|
|
B8
|
ASTM A193
Grade B8
|
AISI 304
|
1/4 and larger
|
--
|
30,000
|
75,000
|
|
B8C
|
ASTM A193
Grade B8C
|
AISI 347
|
|
B8M
|
ASTM A193
Grade B8M
|
AISI 316
|
|
B8T
|
ASTM A193
Grade B8T
|
Bolts,
Screws,
Studs for High-Temperature Service
|
AISI 321
|
1/4 and larger
|
--
|
30,000
|
75,000
|
|
B8
|
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
|
|
B8C
|
ASTM A193
Grade B8C
|
AISI 347
Strain Hardened
|
|
B8M
|
ASTM A193
Grade B8M
|
AISI 316
Strain Hardened
|
95,000
80,000
65,000
50,000
|
110,000
100,000
95,000
90,000
|
|
B8T
|
ASTM A193
Grade B8T
|
AISI 321
Strain Hardened
|
100,000
80,000
65,000
50,000
|
125,000
115,000
105,000
100,000
|
|
L7
|
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
|
|
L7A
|
ASTM A320
Grade L7A
|
AISI 4037
|
|
L7B
|
ASTM A320
Grade L7B
|
AISI 4137
|
|
L7C
|
ASTM A320
Grade LC7
|
AISI 8740
|
|
L43
|
ASTM A320
Grade L43
|
AISI 4340
|
1/4 thru 4
|
--
|
105,000
|
125,000
|
|
B8
|
ASTM A320
Grade B8
|
Bolts,
Screws,
Studs for Low-Temperature Service
|
AISI 304
|
1/4 and larger
|
--
|
30,000
|
75,000
|
|
B8C
|
ASTM A320
Grade B8C
|
AISI 347
|
|
B8T
|
ASTM A320
Grade B8T
|
AISI 321
|
|
B8F
|
ASTM A320
Grade B8F
|
AISI 303
or 303Se
|
|
B8M
|
ASTM A320
Grade B8M
|
AISI 316
|
|
B8
|
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
|
|
B8C
|
ASTM A320
Grade B8C
|
AISI 347
|
|
B8F
|
ASTM A320
Grade B8F
|
AISI 303
or 303Se
|
|
B8M
|
ASTM A320
Grade B8M
|
AISI 316
|
|
B8T
|
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
|
|
A325
|
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
|
|
A325
|
ASTM A325
Type 2
|
Low Carbon Martensitic Steel, Quenched
and Tempered
|
1/2 thru 1
|
85,000
|
92,000
|
120,000
|
|
A325
|
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
|
|
BB
|
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
|
|
BC
|
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
|
|
No Grade
Mark
|
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
|
|
A490
|
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
|
|
No Grade
Mark
|
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
|
|
No Grade
Mark
|
ISO R898
Class 5.8
|
55,000
|
57,000
|
74,000
|
|
8.8
or
88
|
ISO R898
Class 8.8
|
Alloy Steel, Quenched and Tempered
|
85,000
|
92,000
|
120,000
|
|
10.9
or
109
|
ISO R898
Class 10.9
|
120,000
|
130,000
|
150,000
|
|
