Thanks Grip.
I'm anodising and alas I need these things out to do so. They seem to be popped in so I think 'Nutserts'. Its a Yeti ASR.
If I was to drill out the nutserts, whats my chances of getting 2 more put in later?
No problem replacing them at all, but make sure of a few things....
A/ don't drill the old nutserts out with anything bigger than a 6mm.
B/ it can be tricky (depending on position of the nutserts) to get a "normal" pistol drill into position to drill them straight. You DO need to drill them straight so as to ensure you don't damage the existing holes (i.e. the frame) so you may well need to find someone with a right angle drill to get into the tight spots and allow you to drill straight.
C/ as I said before... this tends to be a high stress area WITH HOLES, so it's important that when refitting the nutserts you don't "crush" the frame tubing. Many tube manufactures provide a lbs-per-sq-inch rating that should be exceeded when fitting nutserts to their particular tubing. Unfortunately even the "cheap" nutsert tools are expensive and they don't come with any sort of pressure/torque indicator... so it's a matter of doing it by feel and not going ape on it.
D/ You don't need to buy nutserts in bulk. Most good fastener/bolt shops will have them in stock and sell as many as you need. They are simply called M5 Nutserts. But as I said the tool is expensive. You're better off getting them put in for you. Try your LBS or sheet metal shops (nutserts are often used in sheet metal work).