Proper Socket Size For Bump Stop Nut?

[twenty mike mike]

I'm working blind trying to remove the bump stop nut on the LCA, since I can't get underneath it to look up at the nut. The droop stop nut takes a 9/16", so I presume the bump stop does, too, but fishing around with a socket on a long extension, I just can't seem to fit it on the nut. Can someone confirm that I really need to use the 9/16"?

[Charger-Bodie]

9/16

[twenty mike mike]

Thanks!    I will continue my bumbling efforts.