RV8 inlet/plenum thread sizes

[brett84]

Hey all
Been googling for a couple hours now and still can't seem to find out what the thread is for the carbon canister outlet on the inlet/plenum. Does anyone know this please? I've removed it so need to get a bung.
I thought i read somewhere it's 5/8" but can't find that info anywhere and can't find any 5/8 bungs to just buy and test

[carsy]

Not sure of the thread but i got some blanks for there from Rimmer Bros, only a few quid.

[brett84]

thank you
I've been having a look on their site but can't seem to find it, don't suppose you know what it's called?