u/DisgruntledWombat

Edit - Solved!

I’m trying to replace a bathroom sink drain, but have gotten stuck at removing the retaining nut holding it underneath. I’ve attached some photos (a little hard to make out), but the nut is sitting in a recessed hole that’s probably 3/4” deep.

The depth prevents me from getting channel locks on it. Moreover, there’s very little clearance between the nut and the walls of the hole, I have a basin wrench but am not able to fit its jaws around the nut as there’s not enough space. At my wits end after a few trips to the hardware store so any ideas appreciated!

(Note in the pictures you’ll still see some residual silicone but have since scraped all that off)