does anybody know what this part is called/is

2 mounts at the BOTTOM of the radiator. they have a black plug in both of them.

one of my plugs popped out and rad fluid just falls out from the hole... does anyone know what it is called, can i just plug with a bolt, ??

thanks, ill keep searchin

 

nevermind, i found it. it wont fit in because my radiator is not aligned, but u can erase