Abstract: A fastener system for precision mounting of body parts to a frame in spite of unavoidable manufacturing variations, composed of an anchor hole in a frame and an axially adjustable screw anchor seated stationarily into the anchor hole. The axially adjustable screw anchor includes a base for seating into the anchor hole in the frame, an axial sleeve provided in the base, a plunger slidably mounted within the axial sleeve, and a gap connected with the plunger for providing a mounting surface for the body part being mounted to the frame. the plunger and the cap are each provided with an axial hole for a common self-tapping screw-type fastener. In operation, when a tool brings the body part into a predetermined precise relationship with respect to the frame, the body part engages the mounting surface of the cap and causes the plunger to slide into the axial sleeve exactly the right amount so that the mounting surface of the cap is located precisely where the body part is to be mounted for a precise fit.