M18×1.5 Allen Key Plug — 10 mm Drive Stop an unused oxygen sensor bung dead in its tracks. This m18x1.5 allen key plug threads straight into any standard M18×1.5 O2 bung and stays sealed with no fuss and no exhaust leak. Why This Plug Gets the Job Done Exact Thread Match Cut to M18×1.5 pitch — the same thread spec used on the vast majority of O2 sensor bungs, lambda sensor bungs, and welded exhaust bung caps found on custom turbo-back and diesel exhaust systems. It threads in straight and seats flush every time. 10 mm Allen Drive The internal hex socket takes a standard 10 mm Allen key, giving you positive tool engagement in tight underbody spaces where a standard wrench can't reach. No rounded edges, no slipping. 304 Stainless Steel Construction Built from 304 stainless steel — corrosion-resistant, temperature-capable, and free of any paint or coating that could burn off and contaminate your exhaust. What you see is what stays. Clean, Reusable Design Remove it for a future O2 sensor install or a flex-pipe swap without any drama. The natural stainless finish keeps threads clean and re-torqueable season after season — handy on any DPF delete hardware setup that may need revisiting. Fits the Builds That Matter Diesel exhaust, performance turbo builds, cat-delete systems, or any application where an oxygen sensor bung needs a reliable cap — this plug covers it. M18×1.5 thread pitch for standard O2 and lambda sensor bungs 10 mm internal Allen drive for secure installation 304 stainless steel construction Natural stainless finish with no paint or coating Reusable for future sensor installs or exhaust changes We recommend inspecting the bung threads and applying a suitable high-temp thread sealant before installation if a crush washer is not used. Priced in CAD and shipped from Canada — the right part, without the border hassle. FAQ What thread size does this plug fit? This plug is cut to M18×1.5 pitch and threads into standard M18×1.5 O2 sensor bungs, lambda sensor bungs, and welded exhaust bung caps. What tool do I need to install it? The internal hex socket takes a standard 10 mm Allen key, giving positive tool engagement in tight underbody spaces. What material is the plug made from? It is built from 304 stainless steel, which is corrosion-resistant, temperature-capable, and free of paint or coating that could burn off. Can this Allen key plug be reused? Yes. It can be removed for a future O2 sensor install or flex-pipe swap, and the natural stainless finish helps keep the threads clean and re-torqueable. Do I need thread sealant? We recommend inspecting the bung threads and applying a suitable high-temp thread sealant before installation if a crush washer is not used.
