Combined sample tube, screw cap and marking plug

Description

FIG. 1 is an exploded perspective view of the combined sample tube, screw cap and marking plug showing my new design;

FIG. 2 is an elevational side view thereof in an assembled state, the opposite elevational side view being identical;

FIG. 3 is a cross-sectional view therethrough as seen along line 3--3 in FIG. 5;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a top plan view thereof.