Barrel Bung Cap

FIG. 1 is a front perspective view of a barrel bung cap showing my new design; FIG. 2 is a rear perspective view of the barrel bung cap; FIG. 3 is a front elevation view of the barrel bung cap, the rear elevation view being the same; FIG. 4 is a front elevation cross-sectional view taken at line 4 - 4 from FIG. 6 ; FIG. 5 is a left side elevation view of the barrel bung cap, the right side elevation view being the same; FIG. 6 is a top plan view of the barrel bung cap; and, FIG. 7 is a bottom plan view of the barrel bung cap. The broken lines are for the purpose of illustrating portions of the barrel bung cap and form no part of the claimed design.