With up to 0.1 mm (254 TPI) thread pitch – the finest metric pitch available, these ultrafine adjustment screw and bush sets offer outstanding sub-micron precision with 0.2 micron resolution. M3 ...

For the hacker this usually involves an adjustment screw, where the accuracy is determined by the thread pitch. This was not good enough for [Mark Rehorst] who wanted adjustment down to 10 μm for ...