The following table is given for guidance only and the grades of steel listed here are not mandatory. Unless otherwise stipulated, the final choice of the materials used to give the physical properties specified for the finished nuts in Clause 6 and Table 6 will be left to the manufacturer.
| Grade | Cold formed | Hot forged | Turned from the bar |
|---|---|---|---|
| 0 | Good commercial quality steel | Good commercial quality steel | Good commercial quality steel |
| 1 | EN 2A to D EN 5 |
EN 3, EN 5 EN 8 |
EN 1A, EN 7 EN 8M |
| 3 | EN 5 BS 3111, Type 1 BS 3111, Type 9 |
EN 5, EN 8 | EN 7, EN 8M EN 15M |
| 5 | EN 5 BS 3111, Type 1 BS 3111, Type 9 |
EN 8, EN 12 EN 15, EN 16 |
EN 8M, EN 15M EN 16M |