M18 X 1.5 O2 Lambda Oxygen Sensor Bung Adapter Extender Spacer Silver Dossy

Internal and external thread M18 x 1.5. Outer contour: the hexagonal TURN-KEY 27. Exhaust gas inlet hole 3 mm. In extreme situations narrowing of the inlet hole prevents motor failure (driving at high speed). Polished front surfaces enabling perfect tightening. Threads made with dedicated tool, perfect accuracy and repeatability.