Its leaking and wont seem too tighten

 

that should be a brake bleeder/nipple for the ACD fluid. those things have tapered tips to seal.

 

Aww now it all makes sense. No wonder my fluid from The pump getting low. Thanks! do you know if the bleeder nipple is the same as the brembo nipple I've been searching everywhere online for the part and can't seem to find it only the brembo bleeder keeps poping up

 

it seems to be a standard m10x1.0. should be available from autozone/stores too. hopefully the threads arent damaged