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- ER40 Collet Nut holds all ER40 collets
- Made from alloy steel hardened to 54 - 56rc
- Precision ground ID thread and taper
- ER40 Collet Nut has an internal thread of M50 X 1.5 pitch
- Outside diameter is 2.480 inches (63mm)
- Outside has spanner notches for tightening
- ER40-Wrench works on this collet nut
- Internal cam removes collet when unscrewed
- Black oxide finish
- MariTool Part# ER40-NUT
