{"product_id":"seiko-original-gehausedichtung-o-ring-ref-ez2890n-genuine-seiko-packing-wr","title":"SEIKO Original Case Gasket \/ O-Ring - Ref. EZ2890N – Genuine Seiko Packing (WR)","description":"\u003ch2 data-start=\"241\" data-end=\"285\"\u003e \n\u003cstrong data-start=\"378\" data-end=\"422\" style=\"font-size: 0.875rem;\"\u003eOriginal SEIKO housing seal (O-ring)\u003c\/strong\u003e \u003cspan style=\"font-size: 0.875rem;\"\u003ewith the\u003c\/span\u003e \u003cstrong data-start=\"431\" data-end=\"461\" style=\"font-size: 0.875rem;\"\u003ecorrect reference EZ2890N\u003c\/strong\u003e \u003cspan style=\"font-size: 0.875rem;\"\u003e, supplied in the original\u003c\/span\u003e \u003cstrong data-start=\"487\" data-end=\"523\" style=\"font-size: 0.875rem;\"\u003eSEIKO WP spare parts bag (純正部品)\u003c\/strong\u003e \u003cspan style=\"font-size: 0.875rem;\"\u003e.\u003c\/span\u003e\n\n\u003c\/h2\u003e\n\n\u003cp data-start=\"358\" data-end=\"688\"\u003e This is a \u003cstrong data-start=\"550\" data-end=\"591\"\u003egenuine SEIKO original spare part (NOS)\u003c\/strong\u003e from the historical spare parts supply – \u003cstrong data-start=\"636\" data-end=\"687\"\u003enot a reproduction and not a universal seal\u003c\/strong\u003e .\u003c\/p\u003e\n\n \u003cp data-start=\"690\" data-end=\"872\"\u003eThis seal is designed for \u003cstrong data-start=\"713\" data-end=\"765\"\u003eSEIKO enclosures with a precisely defined groove geometry\u003c\/strong\u003e and is typically used as \u003cstrong data-start=\"805\" data-end=\"822\"\u003ea bottom seal\u003c\/strong\u003e in \u003cstrong data-start=\"827\" data-end=\"860\"\u003eWater-Resistant (WR) models\u003c\/strong\u003e .\u003c\/p\u003e\n\n\u003ch2 data-start=\"879\" data-end=\"908\"\u003e Technical specifications\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\u003cli data-start=\"912\" data-end=\"935\"\u003e\n\n \u003cstrong data-start=\"912\" data-end=\"927\"\u003eManufacturer:\u003c\/strong\u003e SEIKO\u003c\/li\u003e\n\n\u003cli data-start=\"938\" data-end=\"1000\"\u003e\n\n \u003cstrong data-start=\"938\" data-end=\"956\"\u003eReplacement part type:\u003c\/strong\u003e Housing seal \/ O-ring (Packing)\u003c\/li\u003e\n\n\u003cli data-start=\"1003\" data-end=\"1033\"\u003e\n\n \u003cstrong data-start=\"1003\" data-end=\"1019\"\u003ePart number:\u003c\/strong\u003e \u003cstrong data-start=\"1020\" data-end=\"1031\"\u003eEZ2890N\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1036\" data-end=\"1061\"\u003e\n\n \u003cstrong data-start=\"1036\" data-end=\"1045\"\u003eShape:\u003c\/strong\u003e Round (O-ring)\u003c\/li\u003e\n\n\u003cli data-start=\"1064\" data-end=\"1093\"\u003e\n\n \u003cstrong data-start=\"1064\" data-end=\"1075\"\u003eProfile:\u003c\/strong\u003e Standard O-ring\u003c\/li\u003e\n\n\u003cli data-start=\"1096\" data-end=\"1142\"\u003e\n\n \u003cstrong data-start=\"1096\" data-end=\"1109\"\u003eMaterial:\u003c\/strong\u003e SEIKO-specified elastomer\u003c\/li\u003e\n\n\u003cli data-start=\"1145\" data-end=\"1162\"\u003e\n\n \u003cstrong data-start=\"1145\" data-end=\"1155\"\u003eColor:\u003c\/strong\u003e Gray\u003c\/li\u003e\n\n\u003cli data-start=\"1165\" data-end=\"1210\"\u003e \n\u003cstrong data-start=\"1165\" data-end=\"1177\"\u003eCondition:\u003c\/strong\u003e NOS (New Old Stock), unused\u003c\/li\u003e\n\n\u003cli data-start=\"1213\" data-end=\"1267\"\u003e\n\n \u003cstrong data-start=\"1213\" data-end=\"1230\"\u003eScope of delivery:\u003c\/strong\u003e 1 piece in original SEIKO bag\u003c\/li\u003e\n\n\u003cli data-start=\"1270\" data-end=\"1291\"\u003e\n\n \u003cstrong data-start=\"1270\" data-end=\"1283\"\u003eOrigin:\u003c\/strong\u003e Japan\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 data-start=\"1298\" data-end=\"1330\"\u003e Exact allocation \u0026amp; use\u003c\/h2\u003e\n\n\u003cp data-start=\"1332\" data-end=\"1471\"\u003e The reference \u003cstrong data-start=\"1345\" data-end=\"1356\"\u003eEZ2890N\u003c\/strong\u003e belongs to \u003cstrong data-start=\"1368\" data-end=\"1406\"\u003eSEIKO's internal packing code system\u003c\/strong\u003e and is \u003cstrong data-start=\"1415\" data-end=\"1433\"\u003ecase-specific\u003c\/strong\u003e , not universally applicable across models.\u003c\/p\u003e\n\n\u003cp data-start=\"1473\" data-end=\"1498\"\u003e Typical areas of application:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli data-start=\"1501\" data-end=\"1541\"\u003e SEIKO \u003cstrong data-start=\"1507\" data-end=\"1521\"\u003eWR (Water Resistant) housing\u003c\/strong\u003e\n\u003c\/li\u003e\n\n\u003cli data-start=\"1544\" data-end=\"1578\"\u003e Vintage and neo-vintage models\u003c\/li\u003e\n\n\u003cli data-start=\"1581\" data-end=\"1626\"\u003e classic screw-in bases without special clamping ring\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-start=\"1628\" data-end=\"1730\"\u003e Use is \u003cstrong data-start=\"1644\" data-end=\"1698\"\u003eonly permitted if the original part number or housing groove matches\u003c\/strong\u003e . \u003c\/p\u003e\n\n\u003ch2 data-start=\"1737\" data-end=\"1789\"\u003e\u003c\/h2\u003e\n\n\u003ch2 data-start=\"1737\" data-end=\"1789\"\u003e Explanation of the SEIKO packing coding system\u003c\/h2\u003e\n\n \u003ch3 data-start=\"1790\" data-end=\"1815\"\u003eExample: \u003cstrong data-start=\"1804\" data-end=\"1815\"\u003eEZ2890N\u003c\/strong\u003e\n\n\u003c\/h3\u003e\n\n\u003cp data-start=\"1817\" data-end=\"1966\"\u003e SEIKO uses a \u003cstrong data-start=\"1852\" data-end=\"1906\"\u003elogically structured, multi-stage coding system\u003c\/strong\u003e for seals that clearly describes shape, profile, size and material.\u003c\/p\u003e\n\n\u003ch3 data-start=\"1968\" data-end=\"1994\"\u003e Structure of the part number\u003c\/h3\u003e\n\n\u003ch4 data-start=\"1996\" data-end=\"2053\"\u003e 1. First letter – Application type \/ Sealing class \u003c\/h4\u003e\n\n\u003cul data-start=\"2054\" data-end=\"2143\"\u003e\n\n\u003cli data-start=\"2054\" data-end=\"2143\"\u003e\n\n\u003cp data-start=\"2056\" data-end=\"2143\"\u003e \u003cstrong data-start=\"2056\" data-end=\"2061\"\u003eE\u003c\/strong\u003e = Case Back Packing Seal\u003cbr data-start=\"2099\" data-end=\"2102\"\u003e → typical bottom seal for WR housings\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch4 data-start=\"2145\" data-end=\"2185\"\u003e 2. Second letter – profile shape \u003c\/h4\u003e\n\n\u003cul data-start=\"2186\" data-end=\"2280\"\u003e\n\n\u003cli data-start=\"2186\" data-end=\"2280\"\u003e\n\n\u003cp data-start=\"2188\" data-end=\"2280\"\u003e \u003cstrong data-start=\"2188\" data-end=\"2193\"\u003eZ\u003c\/strong\u003e = classic O-ring profile\u003cbr data-start=\"2221\" data-end=\"2224\"\u003e → round cross-section, no lip or flat seal\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch4 data-start=\"2282\" data-end=\"2327\"\u003e 3. Four-digit number – size reference \u003c\/h4\u003e\n\n\u003cul data-start=\"2328\" data-end=\"2498\"\u003e\n\n\u003cli data-start=\"2328\" data-end=\"2498\"\u003e\n\n\u003cp data-start=\"2330\" data-end=\"2365\"\u003e \u003cstrong data-start=\"2330\" data-end=\"2338\"\u003e2890\u003c\/strong\u003e = SEIKO internal size code \u003c\/p\u003e\n\n\u003cul data-start=\"2368\" data-end=\"2498\"\u003e\n\n\u003cli data-start=\"2368\" data-end=\"2421\"\u003e\n\n\u003cp data-start=\"2370\" data-end=\"2421\"\u003e describes the \u003cstrong data-start=\"2385\" data-end=\"2419\"\u003enominal diameter of the housing groove\u003c\/strong\u003e \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"2424\" data-end=\"2448\"\u003e\n\n\u003cp data-start=\"2426\" data-end=\"2448\"\u003e no direct mm measurement \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"2451\" data-end=\"2498\"\u003e\n\n\u003cp data-start=\"2453\" data-end=\"2498\"\u003e clearly within the SEIKO parts system \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch4 data-start=\"2500\" data-end=\"2546\"\u003e 4. Last letter – Material \/ Color \u003c\/h4\u003e\n\n\u003cul data-start=\"2547\" data-end=\"2677\"\u003e\n\n\u003cli data-start=\"2547\" data-end=\"2677\"\u003e\n\n \u003cp data-start=\"2549\" data-end=\"2575\"\u003e\u003cstrong data-start=\"2549\" data-end=\"2554\"\u003eN\u003c\/strong\u003e = grey elastomer \u003c\/p\u003e\n\n\u003cul data-start=\"2578\" data-end=\"2677\"\u003e\n\n\u003cli data-start=\"2578\" data-end=\"2609\"\u003e\n\n\u003cp data-start=\"2580\" data-end=\"2609\"\u003e good aging resistance \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"2612\" data-end=\"2626\"\u003e\n\n\u003cp data-start=\"2614\" data-end=\"2626\"\u003e dimensionally stable \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"2629\" data-end=\"2677\"\u003e\n\n\u003cp data-start=\"2631\" data-end=\"2677\"\u003e typical for WR cases from the 1970s to 1990s \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-start=\"2679\" data-end=\"2794\"\u003e ➡️ \u003cstrong data-start=\"2682\" data-end=\"2702\"\u003eSummary:\u003c\/strong\u003e\u003cbr data-start=\"2702\" data-end=\"2705\"\u003e \u003cstrong data-start=\"2705\" data-end=\"2716\"\u003eEZ2890N\u003c\/strong\u003e = grey SEIKO original bottom seal (O-ring) for defined WR housing size.\u003c\/p\u003e\n\n\u003ch2 data-start=\"2801\" data-end=\"2831\"\u003e Assembly and service instructions\u003c\/h2\u003e\n\n\u003cul\u003e\n\n\u003cli data-start=\"2835\" data-end=\"2866\"\u003e Thoroughly clean the housing groove\u003c\/li\u003e\n\n\u003cli data-start=\"2869\" data-end=\"2925\"\u003e \u003cstrong data-start=\"2878\" data-end=\"2914\"\u003eLightly coat the seal with silicone sealing grease\u003c\/strong\u003e .\u003c\/li\u003e\n\n\u003cli data-start=\"2928\" data-end=\"2953\"\u003e Use without tension\u003c\/li\u003e\n\n\u003cli data-start=\"2956\" data-end=\"2985\"\u003e Do not stretch or twist.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 data-start=\"2992\" data-end=\"3022\"\u003e Note regarding water resistance\u003c\/h2\u003e\n\n\u003cp data-start=\"3024\" data-end=\"3151\"\u003e Installing a new original seal \u003cstrong data-start=\"3064\" data-end=\"3074\"\u003ealone\u003c\/strong\u003e \u003cstrong data-start=\"3082\" data-end=\"3119\"\u003edoes not guarantee watertightness\u003c\/strong\u003e .\u003cbr data-start=\"3124\" data-end=\"3127\"\u003e Key factors include:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli data-start=\"3154\" data-end=\"3185\"\u003e Condition of base and case\u003c\/li\u003e\n\n\u003cli data-start=\"3188\" data-end=\"3216\"\u003e Glass and crown seals\u003c\/li\u003e\n\n\u003cli data-start=\"3219\" data-end=\"3239\"\u003e professional installation\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Vintage \u0026 JDM (Japan Domestic Market)","offers":[{"title":"Default Title","offer_id":52264901280082,"sku":null,"price":14.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0911\/3908\/0530\/files\/FullSizeRender_39057a46-bc94-4467-b17b-5b7501aaf52c.heic?v=1765643597","url":"https:\/\/japanese-microbrands.com\/en\/products\/seiko-original-gehausedichtung-o-ring-ref-ez2890n-genuine-seiko-packing-wr","provider":"Japanese Microbrands - Mario Lenke","version":"1.0","type":"link"}