Spark plug 5476 NGK for OPEL SAAB Original OE/OEM spare part code: 4811581 | 12620540 External diameter [mm]: M14 x 1.25, 4xM10x1 M18x1.5 and M20x1.5 Paired item number: Cylinder bore [mm]: only together with: Ball joint+HYDRO SB External teeth on the wheel side: Brake disc thickness [mm]: Thread length [mm]: Number of pieces [pcs.]: Conical caliber [mm]: External toothing on the differential side: Swinging transverse arm Gearbox side joint diameter [mm]: Wheel side joint diameter [mm]: Internal diameter [mm]: Min. thickness [mm]: Center electrode - iridium, 1 Ground electrode, shielded, 5 kOhm, with conical seat-seal, Fixed SAE connection/fitting Centering diameter [mm]: Lower, Front Axle Left, Front Axle Right, Rear Axle Spark trend [mm]: Steel, Cast iron, Chrome-molybde