M18 x 1.5 O2 Sensor Bung - Stepped (Flat Bottom) - 304 Stainless

304 STAINLESS STEEL O2 SENSOR BUNG — M18 X 1.5 THREAD The Ace Race Parts brand of metric Oxygen (O2) Sensor Bungs is precision machined using solid 304 Stainless Steel bar stock and work with all standard O2 Sensors that use a M18 x 1.5 thread. This specific O2 sensor bung fitting features a Stepped design for added weld strength. Our O2 sensor bungs and bung plugs are a high quality 304 stainless steel option for custom exhausts, downpipes, and OEM repair fabrication projects.