Steel Bolts - SAE Grades
SAE steel bolts - grades ranging grade 1 to 8.2 - proof and tensile strength.
SAE Grade | Head Marking | Size Range (in) | Minimum Proof Strength (103 psi) | Minimum Tensile Strength (103 psi) | Material |
---|---|---|---|---|---|
1 | ![]() | 1/4 - 1 1/2 | Low - medium carbon steel | ||
2 | ![]() | 1/4 - 3/4 7/8 - 1 1/2 | 55 33 | 74 60 | Low - medium carbon steel |
5 | ![]() | 1/4 - 1 1 1/8 - 1 1/2 | 85 74 | 120 105 | Medium carbon steel, Q & T |
5.2 | ![]() | 1/4 - 1 | 85 | 120 | Low carbon martensite steel, Q & T |
7 | ![]() | 1/4 - 1 1/2 | 105 | 133 | Medium carbon alloy steel, Q & T |
8 | ![]() | 1/4 - 1 1/2 | 120 | 150 | Medium carbon alloy steel, Q & T |
8.2 | ![]() | 1/4 - 1 | 120 | 150 | Low carbon martensite steel, Q & T |
- 1 psi (lb/in2) = 6,894.8 Pa (N/m2)