The screen is ONLY for the Pentax Professional series cameras starting with the K-7 (as I recall) to current, K-3. Not all camera models may not be designed to change the matte. Each matte is unique to camera make and model. So, you'll have to check with Nikon if they have a matte similar to the Pentax M60 for your Nikon.
Do you have any recommends which screen that coult fit to my D3200?