Some of the time, chasing the thread works great and it’s simple. All you do is thread the tap into the damaged bolt hole to straighten the threads. If it holds the specific torque rating ...

When inserted into a damaged bolt hole, or a newly drilled one, and then twisted, taps cut into the material and make fresh, new threads. The tool used for this operation is often a T-handle tap ...

the C-Sert’s internal threads are as hard as a tap, making them highly resistant to damage from bolts once installed. “Other products and attempts to repair did not sustain over time,” Dearing says.

a through-hole tap, an installation tool, and a -inch drill bit. The kit's supplied -20 inserts are 0.750-inch in length (1 times the bolt diameter), which is usually considered sufficient ...