ISO 12273:2010 specifies the dimensions of floating, self-aligning, two lug anchor nuts, with MJ threads and a self-locking feature achieved by forming the upper portion out-of-round, of the following classifications:
- 900 MPa/235 °C;
- 900 MPa/315 °C;
- 900 MPa/425 °C.
ISO 12273:2010 is only applicable for the compilation of aerospace product standards.