Abstract: A captured screw assembly is disclosed for locating a fixture plate relative to a base plate. The assembly includes a screw with a head having a diameter larger than the threaded body to form a shoulder. A bushing is frictionally engaged in an opening in the fixture plate and includes a central opening extending through the bushing and the fixture plate. The screw extends through the central opening of the bushing and threadedly engages a threaded hole in the base plate to accurately position the fixture plate relative to the base plate. The shoulder of the screw and a shoulder in the central opening of the bushing abut when the screw is fully engaged in the threaded hole. The screw and bushing include a capture feature formed therebetween to retain the screw within the bushing when the screw is disengaged from the threaded hole.

Abstract: A locator dowel assembly for locating a fixture plate relative to a base plate. The assembly includes a bushing designed to be frictionally engaged in an opening in the fixture plate and define a central opening extending through the bushing and the fixture plate. A locator dowel with an elongated body has a tool engaging feature at one end. The locator dowel has a diameter slightly smaller than the diameter of the bushing to allow sliding movement therebetween. Stop and capture apparatus includes a longitudinally extending slot in the outer periphery of the locator dowel and a stop member positioned in the inner wall of the bushing and extending radially into the central opening. The stop member is engaged in the slot in the locator dowel and forms a stop to limit vertical movement of the locator dowel in the bushing and capturing the locator dowel in the bushing.