Hex Socket Plug 18x1.5mm Stainless Steel

The Hex Socket Plug 18x1.5mm Stainless Steel from DAYTONA SENSORS is a precision oxygen sensor plug designed for automotive exhaust systems and sensor applications requiring reliable sealing. This hex socket plug serves as a threaded closure for oxygen sensor ports, exhaust bungs, and similar ports found in aftermarket exhaust systems, engine testing equipment, and performance tuning installations. It provides a durable, reusable alternative to one-time-use plugs and is essential for anyone working with oxygen sensors, lambda sensors, or custom exhaust fabrication.

Manufactured from stainless steel for superior corrosion resistance and heat tolerance, this plug features an 18mm x 1.5mm male thread specification that matches standard oxygen sensor port dimensions across most automotive applications. The hex socket head design allows installation and removal using standard metric hex wrenches, providing secure mechanical engagement without stripping. The natural stainless steel finish maintains integrity in high-temperature exhaust environments, resisting oxidation and thermal cycling that would degrade lesser materials. Compact dimensions (1.25 x 0.85 x 4.05 inches) ensure compatibility with tight engine bay spacing common in modern and classic vehicles alike.

Professional mechanics, exhaust system builders, and engine tuners benefit most from stocking this plug for permanent or temporary sensor port closure during diagnostic work, custom exhaust installation, or emissions testing. It is commonly used when removing oxygen sensors for cleaning, replacing sensor wiring harnesses, or blocking secondary sensor ports during engine swaps and performance modifications. Installation is straightforward: thread the plug into the 18x1.5mm port and tighten securely with a hex wrench to create an airtight seal. Its reusable nature and durable construction make it a cost-effective solution for repeated maintenance cycles and professional shop environments.