This specification covers metric bolts and screws made from a corrosion and heat resistant, nickel-base alloy of the type identified under the Unified Numbering System as UNS N07001. The following specification designations and their properties are covered:
| MA3378 | 1210 MPa minimum ultimate tensile strength at room temperature |
| 520 MPa stress-rupture strength at 730 °C | |
| MA3378-1 | 1210 MPa minimum ultimate tensile strength at room temperature |
| 726 MPa minimum ultimate shear strength at room temperature |