Has anybody ever seen a 1.55mm allen/hex wrench? I have a nice, titanium limited edition pocket light which has a screw-on pocket clip... Which supposedly takes 1.55mm allen wrench, not 1.5 which would be a standard size. I have managed to use a torx driver to remove the screws but I don't want to mangle them putting it back on. Any thoughts? These are very small threads, although I do plan on heading up to the headware store and seeing if I can find some stainless replacements. Also best fastener material for threading into titanium, just stainless ok?