name of this part?

DusterDude72 said

I always use a pickle fork. (heave duty two pronged wedge basically).

They can be a real pain to get off some times. but hang in there and it will POP off eventually.

Click to expand...

Yeah, beat the fork in there real good and pull down on it when you smack the threaded part with the castle nut still on (but loose to prevent mushrooming of the threads. Give it heck