Viking Husqvarna 6570 repair/ replacement parts.  Shuttle driver with three mounting screws and back washer. Should fit other Husqvarna models including:100, 900, 2000, 5610, 5710, 6000, 6020, 6030, 6440, 6460, 6640, 6470, 6570, 6690 .  Price includes shipping to lower 48.   Return for refund if fails on your machine.