Lockable drumbolt for an open head drum
FIG. 1 is a top, front, and right side perspective view of a lockable drumbolt for an open head drum showing my new design, the broken-line disclosure of a padlock and fragment of a drum closure ring being for illustrative purposes only and forming no part of the claimed design; 
     FIG. 2 is a top, front, and right side perspective view thereof, showing the sliding barrel in an operative position; 
     FIG. 3 is an enlarged front elevational view thereof, showing the sliding barrel in an operative position, the rear being a mirror image of that shown; 
     FIG. 4 is an enlarged top plan view thereof, the bottom being a mirror image of that shown; 
     FIG. 5 is an enlarged front elevational view thereof, the rear being a mirror image of that shown; 
     FIG. 6 is an enlarged right end elevational view thereof; and, 
     FIG. 7 is an enlarged left end elevational view thereof.