[herr-pear]

Heli-coils are, indeed, wonderous things and have many good applications. However, I would hesitate to use one where the base material is thin and there is great bending force present; especially if that force is continually changing. I suppose a vehicle shock mount would fit that discription.

Far better, IMHO, would be a solid threaded insert. These are simply cylinders of metal with a hole tapped in the center the same as the original threads you are replacing and threaded on the outside with a larger standard thread. You drill out the original hole to the proper tapping size for the outside thread of the insert, tap the hole, and screw in the insert. Loc-tite is usually used to anchor the insert but welding would work also. These are widely commercially available or easily homemade.


Roger in Vegas
Retired Aircraft and Industrial mechanic.