[NutmegCarrera]

Very good (necessary) in industrial applications where components need to be attached and removed repeatedly. Example - SMED or change-over parts.

I was lucky enough to utilize one when finishing the timing belt and water pump service on my daughter’s Subaru Forester.
They have a lovely water pump housing that utilizes six or seven bolts to hold the outer half of the housing (so, under pressure) in place.
On the way to having it all finished up, I went to snug up the bolts before torquing. Gues what… threads came right out before it was even finger tight.
Had to undo my entire day’s work so that I could drill and tap for the helicoil. Went very smooth - and has been working well since.
Surprising relief.