F3125 Bolt Types
| Grade | Min Strength, Tensile | Type | Style |
|---|---|---|---|
| A325 | 120ksi min | 1 or 3 | Heavy Hex Head |
| A325M | 830MPa min | 1 or 3 | Heavy Hex Head |
| F1852 | 120ksi min | 1 or 3 | Twist-Off/TC |
| A490 | 150-173ksi | 1 or 3 | Heavy Hex Head |
| A490M | 1040MPa | 1 or 3 | Heavy Hex Head |
| F2280 | 150ksi | 1 or 3 | Twist-Off/TC |
| 144 | 144ksi | 1 or 3 | Heavy Hex Head |
| 144 | 144ksi | 1 or 3 | Twist-Off/TC |
| * Type 1 – 120ksi - carbon, carbon boron, alloy, or alloy boron steel * Type 1 – 150ksi – alloy or alloy boron steel * Type 3 – weathering Steel | |||