Identification
Grade Mark |
Specification |
Description |
Material |
Proof Load |
Yield Strength
Min (psi) |
Tensile Strength
Min (psi) |
 |
SAE J429
Grade 5
ASTM A449 |
Bolts, Screws,
Studs |
Medium Carbon Steel |
85,000
74,000 |
92,000
thru 81,000 |
120,000
thru 105,000 |
 |
SAE J429
Grade 5.1 |
Sems |
Low or Medium Carbon Steel |
85,000 |
- |
120,000 |
 |
SAE J429
Grade 5.2 |
Bolts,
Screws,
Studs |
Low Carbon |
85,000 |
92,000 |
120,000 |
 |
ASTM A325
Type 1 |
High Strength
Structural Bolts |
Medium Carbon |
85,000
74,000 |
92,000
thru 81,000 |
120,000
thru 105,000 |
 |
ASTM A325
Type 2 |
High Strength
Structural Bolts |
Low Carbon |
85,000 |
92,000 |
120,000 |
 |
ASTM A325
Type 3 |
High Strength
Structural Bolts |
Corrion Resistant
Steel |
85,000
74,000 |
92,000
81,000 |
120,000
105,000 |
 |
ASTM A354
Grade BB |
Bolts, Studs |
Alloy Steel |
80,000
75,000 |
83,000
78,000 |
105,000
100,000 |
 |
ASTM A354
Grade BC |
Bolts, Studs |
Alloy Steel |
105,000
95,000 |
109,000
99,000 |
125,000
115,000 |
 |
SAE J429
Grade 7 |
Bolts, Screws |
Medium Carbon Alloy Steel |
105,000 |
115,000 |
133,000 |
 |
SAE J429
Grade 8 |
Bolts, Screws,
Studs |
Medium Carbon Alloy Steel |
120,000 |
130,000 |
150,000 |
| |
ASTM A354
Grade BD |
Bolts, Screws,
Studs |
Alloy Steel |
120,000 |
130,000 |
150,000 |
 |
SAE J429
Grade 8.1 |
Studs |
Medium Carbon Steel |
120,000 |
130,000 |
150,000 |
 |
ASTM A490 |
Structural Bolts |
Alloy Steel |
120,000 |
130,000 |
150,000
thru 170,000 |
| |
ISO R898
Class 4.6 |
Bolts, Screws, Studs |
Low or Median Steel |
33,000 |
36,000 |
60,000 |
| |
ISO R898
Class 5.8 |
Bolts, Screws, Studs |
Low or Median Steel |
55,000 |
57,000 |
74,000 |
 |
ISO R898
Class 8.8 |
Bolts, Screws, Studs |
Median Steel |
85,000 |
92,000 |
120,000 |
 |
ISO R898
Class 8.8 |
Bolts, Screws, Studs |
Median Steel |
85,000 |
92,000 |
120,000 |
 |
ISO R898
Class 10.9 |
Bolts, Screws, Studs |
Alloy Steel |
120,000 |
130,000 |
150,000 |
 |
ISO R898
Class 10.9 |
Bolts, Screws, Studs |
Alloy Steel |
120,000 |
130,000 |
150,000 |
 |
ASTM A320
Grade B8 |
Bolts, Screws, Studs |
AISI 304 |
- |
30,000 |
75,000 |
 |
ASTM A320
Grade B8C |
Bolts, Screws, Studs |
AISI 347 |
- |
30,000 |
75,000 |
 |
ASTM A320
Grade B8T |
Bolts, Screws, Studs |
AISI 321 |
- |
30,000 |
75,000 |
 |
ASTM A320
Grade B8F |
Bolts, Screws, Studs |
AISI 303
or 303Se |
- |
30,000 |
75,000 |
 |
ASTM A320
Grade B8F |
Bolts, Screws, Studs |
AISI 316 |
- |
30,000 |
75,000 |
 |
ASTM A320
Grade B8 |
Bolts, Screws, Studs |
AISI 304 |
- |
50,000
Thru 100,000 |
105,000
Thru 125,000 |
 |
ASTM A320
Grade B8C |
Bolts, Screws, Studs |
AISI 347 |
- |
50,000
Thru 100,000 |
105,000
Thru 125,000 |
 |
ASTM A320
Grade B8F |
Bolts, Screws, Studs |
AISI 303
or 303Se |
- |
50,000
Thru 100,000 |
105,000
Thru 125,000 |
 |
ASTM A320
Grade B8M |
Bolts, Screws, Studs |
AISI 316 |
- |
50,000
Thru 100,000 |
105,000
Thru 125,000 |
 |
ASTM A320
Grade B8T |
Bolts, Screws, Studs |
AISI 321 |
- |
50,000
Thru 100,000 |
105,000
Thru 125,000 |
| |
ASTM A193
Grade B8T |
Bolts, Screws, Studs |
AISI 321 |
|
30,000 |
75,000 |
| |
ASTM A193
Grade B8 |
Bolts, Screws, Studs |
AISI 304 |
- |
50,000
thru 100,000 |
100,000
thru 125,000 |
| |
ASTM A193
Grade B8C |
Bolts, Screws, Studs |
AISI 347 |
- |
50,000
thru 100,000 |
100,000
thru 125,000 |
| |
ASTM A193
Grade B8M |
Bolts, Screws, Studs |
AISI 316 |
- |
50,000
thru 95,000 |
90,000
thru 125,000 |
| |
ASTM A193
Grade B8T |
Bolts, Screws, Studs |
AISI |
- |
50,000
thru 95,000 |
100,000
thru 120,000 |
| |
SAE J429
Grade 1 |
Bolts, Screws, Studs |
Low or Median Carbon Steel |
33,000 |
36,000 |
60,000 |
 |
ASTM A320
Grade L7B |
Bolts, Screws, Studs,
Low temp Appl. |
AISI 4137 |
- |
105,000 |
125,000 |
 |
ASTM A320
Grade L7C |
Bolts, Screws, Studs,
Low temp Appl. |
AISI 8740 |
- |
105,000 |
125,000 |
|
