GZ44386 – 2in Coarse to Fine Thread Drump Bung Converter Converts 2 Fine male threads found on most pumps / drum bungs to 2 male Coarse threads making the pumps good 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) high.