Our ER25 collet nuts are precision machined and are compatible with ER25 Collets. Having a nut for every collet allows for more convenient tool changes without the need to exchange collet nuts.
 
Made from alloy steel hardened to 54 - 56rc
Precision ground ID thread and taper
Has an internal thread of M32 X 1.5 pitch
Outside diameter is 1.650 inches (42mm)
Outside has spanner notches for tightening
ER25-Wrench works on this collet nut
Internal cam removes collet when unscrewed
Black oxide finish