Closure plug
FIG. 1 is a plan view of a closure plug showing my new design; 
     FIG. 2 is a bottom view thereof; 
     FIG. 3 is a front view thereof; 
     FIG. 4 is a rear view thereof; 
     FIG. 5 is a right side view thereof; 
     FIG. 6 is a left side view thereof; and 
     FIG. 7 is a sectional view taken on line A--A of FIG. 1.