The ornamental design for a screwlockassembly, as shown and described.
FIG. 1 is a perspective view of the screw lock assembly including a screw
and cup washer (bracketed in drawing) utilizing the new design of my
invention;
FIG. 2 is a side view of the screw lock assembly with the _cup washer
properly positioned for use;
FIG. 3 is a top view of the screw lock assembly taken from a direction
looking in from the left _of FIG. 2; and
FIG. 4 is a bottom view of the screw lock assembly taken looking in the
direction to the right in FIG. 2.