Thread Inserts

I have used those in the past, I usually by them when I need them could not stock all that I would need. but I do stock many of the 8/32 to 3/8 sheet metal type and have a toool for all of them.
 
Heli-coil inserts are another type, have a long history with them, time tested good product.

greg
 
I have used them quite a bit. There are a couple of different styles, but the key locking ones are the most secure. There are others available that have thread locking compound on them and have two little slots on the top. Drill and tap the hole, then turn the insert in with a standard screwdriver, or you can use a bolt and a locknut.
 
Helicoils are ok and they have their uses, but these inserts with the locking tabs are the bomb!
 
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