Timesert sets the industry standard for thread repair. I've also used Helicoil and Recoil which are spring style thread repair kits and they have their place (much cheaper) but if you need to economize a bit and need it to last, solid Timesert inserts are the only way. go. Inserts are available in various lengths for reduced clearance applications. Far better than any other thread repair I have seen and I have been repairing threads for over 35 years.
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