Is any one aware of a good source of extra-fine thread set or cap head screws. The small 12x12x12mm cubes I am fabricating into knife edge mirror mounts have a pretty small lever arm and even with maxed out spacing of the 3x0.5mm set screws the best I can do is .5mrad pointing and that's with a very genital touch. That level of pointing is comparable to the beam divergence and so contributes significantly to the combined beam size. The super fine thread steel/brass inserts are too big ( and probably too expensive ). A little larger dia. and/or a little finer pitch is all I'm looking for. The few older Edmond Tech Spec value style mounts I own have these 0.25mm-0.5mm pitch approx. 8mm dia. screws directly threaded into the aluminum mount. That is close to what I'm looking for. Extra-fine taps wouldn't hurt either.