Re: Newb here in ATX
I have a Skyhawk frame as well... and I also fell for gasbike.net's stupid trap. They offered one for an extra $7. I bought it and it was female threads. Well, so is the bike. Turned out, the one that came with the engine kit that fits in the peanut tank fits as well.
But it is a regular metric thread. Not BSP, not NPT, but straight metric thread. I think it is 10mm, but I think it's 10x1.5, not 10x1.0.
And don't forget, there's got to be a sealing washer for it, or it'll leak.