ER11-A Collet nut. This nut is used to mount collet chucks on your DC machining spindles.
Machinists often prefer to mount a nut thanks to a collet chuck in order to be able to quickly swap end mills with different shank diameters. Thus, each collet chuck has its own pre-installed nut.
Material: CR40 steel
Type of collet nut: ER11-A
Collet chuck: 17 mm
Suitable for ER11 collet chucks for end mills with shank diameter between 1 and 7 mm.