NPS Plug and Buttress Plug – Side by Side

large thread drum plugs, fine thread drum plugs and barrel bungs, edpm gaskets.

NPS Plug SPP-L16-WL and Buttress Plug SPP-L10-WL Side by Side

This image demonstrates the difference between a buttress plug (course thread barrel bung) and a NPS plug (fine thread barrel bung). Both have an EDPM gasket and feature a 3/4″ NPS center reducer. Most of our larger 30 and 55 gallon plastic drums come with one of each fitting.