Before you consider re tapping the threads re check to make sure you have the right sized anode rod.
Rv water heater anode thread size.
I reached out to my contact at suburban and they advised me that your water heater has a 3 4 npt national pipe threading and it has 12 threads inch.
You ll need a 3 4 inch npt thread chaser since the replacement anode will likely have a tapered pipe thread.
What size type anode do i need for my hot water tank.
Ozek rv water heater magnesium anode rod with ptfe tape compatible with suburban and mor flo water heater tanks 9 25 length npt threads 2 pack 4 8 out of 5 stars 853 11 99.
To use a standard tap may actually remove portions of the existing threads as well as cut new threads something to be avoided in a water heater tank fitting.