Load Indicating Externally Threaded bolts, studs, and cap screws
| Load-Indicating Fastener Grade/Head Marking | Bolt Diameter, in. | Min. Tensile Strength Classification | Mechanical/Chemical/Testing Requirements In Accordance With: |
|---|---|---|---|
| ASTM F2482 Grade 325-1 | 1/2 to 1, incl. | 120 000 psi | Specification A325 Type 1 |
| 11/8 to 11/2 , incl. | 105 000 psi | ||
| ASTM F2482 Grade 325-3 | 1/2 to 1, incl. | 120 000 psi | Specification A325 Type 3 |
| 11/8 to 11/2 , incl. | 105 000 psi | ||
| ASTM F2482 Grade 490-1 | 1/2 to 11/2 in., incl. | 150 000 psi | Specification A490 Type 1 |
| ASTM F2482 Grade 490-3 | 1/2 to 11/2 in., incl. | 150 000 psi | Specification A490 Type 3 |
| ASTM F2482 Grade 449 | 1/4 to 1, incl. | 120 000 psi | Specification A449 Type 1 |
| 11/8 to 11/2 , incl. | 105 000 psi | ||
| 13/4 to 3, incl. | 90 000 psi | ||
| ASTM F2482 Grade 354-BC | 1/4 to 2 1/2 , incl. | 125 000 psi | Specification A354 Grade BC |
| 21/2 to 7, incl. | 115 000 psi | ||
| ASTM F2482 Grade 354-BD | 1/4 to 21/2 , incl. | 150 000 psi | Specification A354 Grade BD |
| 21/2 to 7, incl. | 140 000 psi | ||
| ASTM F2482 Grade 193B7 | 1/4 to 21/2 , incl. | 125 000 psi | Specification A193/A193M B7 |
| 21/2 to 4, incl. | 115 000 psi | ||
| 4 to 7, incl. | 100 000 psi | ||
| ASTM F2482 Grade 193B7M | 1/4 to 4, incl. | 100 000 psi | Specification A193/A193M B7M |
| 4 to 7, incl. | 100 000 psi | ||
| ASTM F2482 Grade 193B5 | 1/4 to 4, incl. | 100 000 psi | Specification A193/A193M B5 |
| ASTM F2482 Grade 193B6 | 1/4 to 4, incl. | 110 000 psi | Specification A193/A193M B6 |
| ASTM F2482 Grade 193B16 | 1/4 to 21/2 , incl. | 125 000 psi | Specification A193/A193M B16 |
| 21/2 to 4, incl. | 110 000 psi | ||
| 4 to 7, incl. | 100 000 psi |
Product Shall be Marked with our manufacturing trade mark "TorqBolt" or "TB" along with the designated Grade.
Grade and manufacturer’s identification symbols shall be applied to one end of studs and to the heads of bolts and screws of all sizes. (If the available area is inadequate, the grade symbol may be marked on one end and the manufacturer’s identification symbol marked on the other end.) For bolts and screws smaller than 1⁄4 in. [6 mm] in diameter and studs smaller than 3⁄8 in. [10 mm] in diameter and for 1⁄4 in. [6 mm] in diameter studs requiring more than a total of three symbols, the marking shall be a matter of agreement between the purchaser and the manufacturer.