You have a stepper motor, but you need to attach it to your CNC project? 

Not so easy if you don't have a stepper motor mount just like this one here! 

This mount will fit any NEMA-17 motor (with 31mm hole spacing) with four screws. There's two 30mm long slots, 30mm apart so you can easily attach it. Made of steel with welded 90-degree support triangles, its got a solid construction