Item description for Buna-N U-Cups, McMaster-Carr, 2 3/8"ID x 3"OD x 5/16", 5-Pack

New, old stock.

Buna-N U-Cups, McMaster-Carr, 2 3/8"ID x 3"OD x 5/16", 5-Pack

Made of Buna nitrile for use with a variety of fluids from petroleum to aliphatic hydrocarbons. U-shaped cross-section to provide a seal between cylindrical overlapping surfaces.