Heli-Coil Alternative - Keenserts

[goodfellow]

These are Keenserts -- I have been using these for high strength repairs for the last two decades. I believe that they were originally developed by Fairchild. Then the technology was picked up by ALCOA and marketed as "Tridair-Keenserts". For repairing heads, these are a stronger alternative to traditional Heli-Coil fasteners.

Here is a good "How-To" PDF, that explains the install and the benefits --

http://www.mediafire.com/?sharekey=77da8fd4484b5e25312dbd5f2bdc5062ec150950fe7248a45621d66e282a0ee8