{"product_id":"spark-exhaust-sealing-washer-12x18","title":"Spark Exhaust Copper Sealing Washer 12 × 18 mm for M12 Plug Universal ROND12X18R","description":"\u003cp\u003eA copper washer, twelve millimetres by eighteen, one euro. It seals the M12 lambda plug and nothing else in Spark's range needs it.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCopper sealing washer, 12 × 18 mm.\u003c\/li\u003e\n\u003cli\u003eFor Spark's M12 lambda plug, article TAPPO017.\u003c\/li\u003e\n\u003cli\u003eSpark part number ROND12X18R.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhy Copper\u003c\/h2\u003e\u003cp\u003eCopper is soft enough to deform into the surface irregularities of a boss and stable enough to stay sealed at exhaust temperature. It is the standard sealing material for threaded exhaust fittings for exactly that reason.\u003c\/p\u003e\u003ch2\u003eA Consumable\u003c\/h2\u003e\u003cp\u003eA crush washer seals by being crushed. Once it has taken the shape of one joint it will not seal another as well, and reusing one is the usual reason a plug that was tight last year ticks this year. At one euro there is no argument for it.\u003c\/p\u003e\u003ch2\u003eTwelve by Eighteen\u003c\/h2\u003e\u003cp\u003eTwelve millimetres inside, eighteen outside. The inner figure has to match the plug's thread and the outer one has to cover the sealing face on the boss — a washer that is too small in either direction seals on nothing.\u003c\/p\u003e\u003ch2\u003eOrdering\u003c\/h2\u003e\u003cp\u003eOne per plug. If you are ordering TAPPO017, order this alongside it — the plug does not come with one.\u003c\/p\u003e","brand":"Spark Exhaust","offers":[{"title":"Default Title","offer_id":53618383028490,"sku":"ROND12X18R","price":11.33,"currency_code":"SEK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/ROND12X18R.png?v=1788511403","url":"https:\/\/inter-pace.com\/en-se\/products\/spark-exhaust-sealing-washer-12x18","provider":"Inter-Pace","version":"1.0","type":"link"}