AP T8 RHP installation

[CALM Pythons]

So I'm gonna be splitting a T8 in half- I noticed that AP uses a "nut" on the outside for their installs. Is this necessary or is screwing the RHP to cage enough on its own?

When you say "is Screwing the RHP enough" I assume you mean something like a Sheet Rock screw without a nut on the other side. The answer is no unless you want to take a chance of the whole panel falling and killing the snake. I put my nut on the inside so the think screw head is on the outside because I stack my T12's.