Having a hell of a time finding compatible fittings for the Hiwin 20mm series of guides and rails. According to the spec sheet, and confirmed by measurements, the thread seems to be a metric 6mm X .75mm. What is available is a 6mm X 1mm fitting, at least as far as I've found. Either one of the blocks I ordered was missing a fitting, or I misplaced it, but either way I need to pick up some new ones, and straight ones at that instead of the 45 degree ones that were supplied. Anyone have any advice where to find these things?