Nuts for ER collets with concentric collet extractor, for balanced chucks

| Article | D | Right thread | L | Collet |
|---|---|---|---|---|
| 80/ER25C | 42 | M 32 x 1,50 | 20 | ER25 |
| 80/ER32C | 50 | M 40 x 1,50 | 22,5 | ER32 |
| 80/ER40C | 63 | M 50 x 1,50 | 25,5 | ER40 |
| 80/290 | 50 | M 40 x 1,50 | 24 | GRIFO/290 |
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