Washing Machine Hookup Box

I have the box in the photo that I want to connect to 1/2 CPVC water lines. The valve connections are machined inside to solder to copper. I want to use the outside threads and use a Metal/CPVC female adapter but not sure if these threads will work. Are they 1/2 inch pipe threads. The CPVC female adapter in
Photo seems to go on OK but I want to use one of those that has a factory Metal to CPVC connection and screws on like the plain CPVC female in photo.

Thanks
JM