Heli-Coil 5546-5 M5 x 0.8 Metric Coarse Thread Repair Kit

No instructions with package.Worked fine, but a bit finicky to install.

I used this to repair a stripped out carburetor. Worked perfectly and there were no leaks on the carb. This item saved me quite a bit of coin. The size sold is of the size of the bolt, screw or threaded hole size. Don't worry too much about the size of the tap itself unless you need to buy a drill bit as it will be bigger than the size you would use normally for the size bolt you have. I actually waited until the product showed up, then I checked to see if I had the correct drill bit. I did so everything went well. I guess if you don't have the bit you need, you can then run out and get a drill bit or a set. Good luck!

purchased this because I stripped some threads from over tightening on several mountain bike components. components are aluminum so slightly over tightening will strip the thread, but luckily these thread repair tools exist. if you ever need to use such type system I would not recommend any of the local auto parts thread repair packs. having used them before I was very disappointed with the results. the helicoil kit is an effortless installation and restores threads in a few minutes. great product, very satisfied with results.

I had never done this sort of repair before, but when it came to possibly losing my carbon fiber bike fork to a stripped bolt hole I figured I would give it a shot. I was able to do the repair in about 15-20 min and saved myself a couple hundred bucks.The only complaint I have about it was that the plastic guide sleeve around the installation tool actually made it harder to get the helicoil into the new threads I cut. I ruined one helicoil, pulled it out, and put a new one back in without the guiding sleeve and it went in just fine.Also, you will need a couple things it doesnt come with. The drill bit I had, but I also had to order a T-handle tap wrench so I could get proper leverage to cut the threads.

Used this to repair 2 stripped threaded holes on an FMF muffler. Worked great. Drilled them out with a 13/64" drill bit (as directed), ran the provided tap (using this  Vermont American 21916 T-Handle Tap Wrench 0 through 1/4 Inch ), and installed the heli coil with the provided tool, adding some  Loctite 37421 271 Red Heavy Duty Threadlocker  to keep the heli coil from coming out.This was my first time doing a heli coil and it was surprisingly easy. And the new bolts went it smoothly and without a hitch. Highly recommended!

The tap dulled after one hole in mild steel. Then the install tool also chipped while installing the first helicoil right where the tang keys into it making it useless. I've used helicoils for years with no issues, but this kit said made in china on it. Going to switch to keenserts instead.

This product doesn't come with any instructions but plenty of information including videos are available on-line. I used it on a Dura Ace rear deraillluer cable stop bolt. Worked great!

Very straightforward to use. Like others said, for M5, use a 4.8 mm or 3/16 drill