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.