How to repair a broken thread in 11 steps

If the thread is damaged, the screw can no longer be screwed into or out of the thread.

Thread repair kits help here

11 steps to thread repair:

Determine the thread size using a thread template
Refer to the GSR manual for thread size
Clamp the appropriate core drill bit
Oiling a core drill bit with thread cutting fluid
Drill out the broken thread with the core drill
Clamp the appropriate tap in a tap wrench
Oil the tap with thread cutting fluid
Cutting the thread for the thread insert
Select a suitable thread insert and screw it in with the aid of the screw-in tool
Break the tang with the tang breaker
Do not forget to check your new thread