GROZ 44386 Drum bung converter. Converts 2” fine male threads found on most pumps/drum bungs to 2” male Coarse threads. This makes the pump suitable for use on plastic drums with 2” Coarse female threads. Polypropylene Co polymer construction, designed with 4 protrusions for easy tightening. Dimensions: 3-1/4” (82 mm) dia. X 1-35” (34 mm) height.