FIG. 1 is a perspective view of a systematic displacement screw showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a sectional view taken along the lines 3—3 of FIG. 2;

FIG. 4 is a bottom plan view thereof taken along the lines 4—4 of FIG. 2; and,

FIG. 5 is a top plan view thereof.