Made from selected steel. A tool wrench for tightening and loosening hexagon head cap screws.
| Code | Across Flats mm | Code | Across Flats mm | Code | Across Flats mm |
| 611241 | 1.4 | 611249 | 6 | 611256 | 16 |
| 611242 | 1.5 | 611280 | 6.5 | 611257 | 17 |
| 611243 | 2 | 611250 | 7 | 611258 | 19 |
| 611244 | 2.4 | 611283 | 7.5 | 611259 | 21 |
| 611245 | 2.5 | 611251 | 8 | 611260 | 22 |
| 611246 | 3 | 611284 | 8.5 | 611261 | 23 |
| 611277 | 3.5 | 611252 | 9 | 611262 | 24 |
| 611247 | 4 | 611285 | 9.5 | 611263 | 26 |
| 611278 | 4.5 | 611253 | 10 | 611264 | 27 |
| 611248 | 5 | 611254 | 12 | 611265 | 32 |
| 611279 | 5.5 | 611255 | 14 | 611266 | 36 |