No problem if installed correctly.Just make sure the hole is straight and use a tap guide.
Threaded inserts are used on aircraft,so they must be safe.

 

took the words right outa my mouth

 

&nbsp\\;If you have the wall thickness this is the prefererred set up over the slinky type helicoil. You can get these from mcmaster-carr.
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you might want to consider a threaded insert, much stronger then a helicoil, a litter harder to install but much better

 

when possibel I prefer to make a insert with a lip installed from the back side
so it can't ever pull out but heli coils have been used for years on almost everything with good results

[IMG]local://upfiles/5757/7E699B9F5E5C417EB1389268090FE865.jpg[/IMG]

 

Thread lock or thread insert = same product/different trade name

 

Here's the best thread repair I know of:
http://www.timesert.com/