Berk Technology BTO2-Plug Universal Stainless Steel O2 Bung Plug Fitting M18x1.5-17mm Head
Berk Technology stainless steel oxygen sensor bung plug (O2 bung). Universal M18x1.5 thread pitch to fit virtually all O2 bung plugs. Used to seal off O2 bung hole when wide band O2 air fuel sensor is not in use. Uses standard 17mm size head, far less prone to stripping than allen key plugs. Easier access for installation and removal in tight spaces.