O2 Oxygen Sensor Stepped Mounting Boss Bung M18 x 1.5

works great

With the step in the bung, it is very easy to weld into an exhaust pipe. Even a hack welder like myself can make it seal up. It ain't pretty, but it doesn't leak.

Easy install

Worked fine I used it for a drain on my transmission pan

This bung Work great data is supposed to do I welded it in Austin sensor screw right on it. Very nice don't you know what a weld you're good to go right in

This is so much better that the clamp on bung my kit was supplied with. Simple cut a hole in the exhaust and weld in the bung. Great quality.

Fit great

Until now, my bung hole was rotten and loose. Bung hole leakage was a continuous battle.. Years of agitation and abuse were just too much for it to take. This product was the perfect way to rejuvenate my bung hole to the tight and fresh one it once was. To install, I carefully reamed out my bung hole - I was afraid to make my bung hole too loose so I used a fine graduation stepper bit to slowly widen my bunghole little by little. This fitting then simply slid into my bung hole with slight force and then I very easily tightened by bung hole around it with some weld beads. I’m happy to say that this fitting is now permanently stuck in my bung hole.