Piusi F19473000 2-1/2" x 5 Buttress Thread to 2" Drum Bung Hole Adapter

The Piusi p/n F19473000 is a 2-1/2" x 5 buttress thread 
to 2" drum bung hole adapter fitting. This allows Piusi
DEF pumps (which have 2-1/" x 5 buttress threads) to
be used with regular 55 gallon drums, which have a 2"
bung hole.

This design allows Piusi stainless steel rotary drum
pumps F00332A30 to be used with drums of anti-freeze
or windshield washer fluid.