The ornamental design for an interferencescrew, as shown and described.
FIG. 1 is a perspective view of an interference screw of the new design;
FIG. 2 is a front elevational view of the interference screw of FIG. 1;
FIG. 3 is a rear elevational view of the interference screw of FIG. 1;
FIG. 4 is a left-side elevational view of the interference screw of FIG. 1;
FIG. 5 is a right-side elevational view of the interference screw of FIG. 1;
FIG. 6 is a top plan view of the interference screw of FIG. 1;
FIG. 7 is a bottom plan view of the interference screw of FIG. 1; and,
FIG. 8 is a cross-sectional view of the interference screw of FIG. 1.
The broken lines shown in the drawings are included for purposes of illustrating portions of the design or environment and form no part of the claimed design.