Make sure that the surrounding area is free of any valuable items as the action to strike the motion against the plumbing nut.
Delta sink faucet bonnet nut stuck.
Apply heat to the stuck fixture or.
But often that nut will be frozen due to corrosion or mineral buildup from years of water seepage.
The easy way to access a corroded basin faucet fixing nut for removal.
To remove the bonnet nut turn it in a counterclockwise direction with a wrench until the nut is free from the threads on the valve then lift the nut up and over the valve to complete the removal process.
Removing a stuck on bonnet nut when changing a cartridge on the delta shower valve.
Sometimes you need a hammer to break the nut.
The stroke by billy squier permission to use in this video by the legend hims.
Here are some nut freeing tricks from richard trethewey.
The bonnet nut fits over the faucet valve and holds the valve into place.
Put a wrench on the fixture or nut and strike the handle sharply with a hammer to loosen the fixture.
Any time you replace an old faucet you have to take off the locking nut that holds the faucet tight to the countertop.