Hello,
I supose that your questions refers to 19" type of case, but I don't know if you're talking about the holes that holds the FP to it's own case, or the one that permits the mounting inside a 19" rack.
Anyway, in both case, the answer is no. Each enclosure makers has his own way to attach the FP to the case, and I have seen different types and positions of holes for rack mounting....
You can try to look at some tech data from the sellers site to get an idea...
Axel