SM098 U-notch Oxygen Sensor Nut

The U‑notch oxygen sensor nut is a specialized weld‑on bung fitting built for custom exhaust modification. Its distinctive U‑shaped notch design solves the common trouble of difficult sensor disassembly after long‑term high‑temperature working. This nut is welded onto exhaust pipes, manifolds and catalytic converters, offering stable mounting base for standard M18×1.5 oxygen sensors for aftermarket refitting projects.

U‑Notch Structure for Easy Disassembly & Maintenance

The core highlight is the U‑shaped open notch. Under long‑term exhaust high‑temperature environment, oxygen sensors are prone to seizure. The notch structure allows slight deformation during wrench operation, reducing thread locking stress. Technicians can take out old or faulty sensors much faster during repair or replacement, saving plenty of working time for modification shops and repair garages.

Material Selection for Different Working Conditions

Two material options are provided to match diverse project demands. Carbon‑steel version brings high mechanical toughness with competitive cost, fit for cost‑sensitive custom exhaust orders. Stainless‑steel option possesses outstanding high‑temperature resistance and corrosion resistance, perfectly suited for vehicles working in humid, salt‑spray and harsh undercar conditions.

Precision M18×1.5 Thread & Weld‑on Performance

Made by high‑precision CNC machining, internal M18×1.5 thread strictly follows industry standard, ensuring smooth screwing‑in for mainstream oxygen sensors from American, European and Japanese vehicles. The outer surface allows solid full‑weld or spot‑weld connection with exhaust tubing. Good welding performance prevents crack or falling‑off under exhaust thermal cycling.

Main Application Scenarios

Mainly applied for aftermarket custom exhaust pipe fabrication, modified exhaust manifold production and catalytic converter rebuild. It works as weld‑in bung for oxygen‑sensor mounting points, widely adopted by auto modification workshops, exhaust component manufacturers and repair service providers.

Factory Batch Supply & Custom Support

Every SM098 U‑notch nut passes dimension inspection and thread checking before delivery. As direct manufacturer, we support bulk wholesale orders. Customized requirements such as material replacement, dimension adjustment and special surface treatment are acceptable for global automotive aftermarket buyers.