SS304 hexagonal plugs, chamfered base nuts, and a welded nut adapter for lambda (oxygen) sensor installation — M18×1.5, silver Key benefits Ensures a precise, secure fit for lambda/oxygen sensors with M18×1.5 threads, reducing the risk of leaks or sensor movement. SS304 stainless steel construction provides durable corrosion resistance and long-term reliability in exhaust and engine environments. Adapter and nut designs simplify installation and repair work, saving time during sensor replacement or custom fabrication. Silver finish gives a clean, professional appearance and matches common stainless components. What this product does Hexagonal plugs: seal unused sensor ports or protect threads during repairs and fabrication. Chamfered base nuts: provide a flush, properly seated mounting surface for lambda sensors. Welded nut adapter: allows secure welding of an M18×1.5 sensor thread to exhaust pipes or custom mounts for reliable sensor installation. Key attributes Thread specification: M18×1.5 — compatible with lambda/oxygen sensors that use this standard thread size. Material: SS304 stainless steel — corrosion-resistant and suitable for elevated temperatures typical of exhaust systems. Color: silver — natural stainless finish. Components: hexagonal plugs, chamfered base nuts, and welded nut adapter for oxygen sensor installation. Practical use scenarios Replacing a worn or damaged sensor thread on an exhaust pipe: weld the SS304 nut adapter in place to restore a proper M18×1.5 mounting point for a new lambda sensor. Temporarily or permanently sealing an unused sensor port during testing, engine work, or sensor removal using the hexagonal plug. Installing sensors in custom exhaust systems or fabricated manifolds where a reliable threaded mounting point is needed; use the chamfered base nut for correct seating and the welded adapter where welding is required. Why choose this set Matches standard M18×1.5 lambda/oxygen sensor threads for straightforward compatibility. SS304 material balances corrosion resistance, strength, and suitability for exhaust applications without introducing dissimilar metals. Designed to support proper sensor function by maintaining a secure, correctly positioned mounting. Contents and compatibility Includes SS304 hexagonal plugs, chamfered base nuts, and an SS304 welded nut adapter sized M18×1.5. Intended for vehicles and equipment using M18×1.5 lambda/oxygen sensors; verify thread size on your sensor or port before purchase. Installation notes For welded applications, follow proper welding procedures for stainless steel to avoid distortion or weakening. Ensure threads are clean and correctly torqued per sensor manufacturer recommendations to prevent damage. Material and finish Material: SS304 stainless steel Color: silver This product delivers a durable, compatible solution for installing, sealing, or repairing M18×1.5 lambda/oxygen sensor ports in exhaust and related systems.