My name is Jose. My problem is with my distributor valve in my shower. I removed the hot water valve and the seat in the end was broken. It came off with another ring, I don't know what this other ring and neither does the hardware store. The new seat is the same size as the old one but the thread has nothing to catch onto. Can some one please help me figure this out. Thank you.

Can you tell us the brand of mixing valve you have or post a picture?

In order to help you we need to know brand and type. Like Ballangerb1 said, please, post photo. Thanks. Milo