{"product_id":"merc-85","title":"Mercury Quicksilver Screw 5\/16\"-18 × 3\/4\" 25299","description":"\u003ch2\u003eMercury Quicksilver Screw 5\/16\"-18 × 3\/4\" — Part 25299\u003c\/h2\u003e\n\u003cp\u003eA genuine Quicksilver OEM screw for Mercury and MerCruiser assemblies, catalogued as \u003cstrong\u003e10-25299\u003c\/strong\u003e. Thread size is \u003cstrong\u003e5\/16\"-18 (UNC) × 3\/4\" length\u003c\/strong\u003e. This part is no longer in current production; we carry a limited quantity of original old-stock inventory. Order while available.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Quicksilver OEM fastener\u003c\/li\u003e\n\u003cli\u003ePart number: \u003cstrong\u003e25299\u003c\/strong\u003e \/ \u003cstrong\u003e10-25299\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eThread: \u003cstrong\u003e5\/16\"-18 UNC × 3\/4\" length\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eOriginal factory specification — not aftermarket\u003c\/li\u003e\n\u003cli\u003eLimited old-stock availability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFitment \u0026amp; Application\u003c\/h2\u003e\n\u003cp\u003eUse this screw where the Mercury or MerCruiser parts diagram specifies part number \u003cstrong\u003e25299\u003c\/strong\u003e or \u003cstrong\u003e10-25299\u003c\/strong\u003e. Fitment varies by engine model, drive type, and serial number range — always confirm against your specific parts diagram before ordering.\u003c\/p\u003e\n\n\u003ch2\u003eWhen to Replace\u003c\/h2\u003e\n\u003cp\u003eReplace when the screw is corroded, stripped, rounded, stretched, or has been removed from a critical assembly during service and cannot be safely reused. Fasteners in high-vibration or water-exposed positions should be inspected at every service interval.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp\u003eConfirm thread pitch, length, diameter, and finish against the diagram position before installation. Follow the Mercury service manual for torque specifications, locking compound requirements, and reuse limits. Do not substitute a generic fastener in a position that specifies an OEM part.\u003c\/p\u003e\n\n\u003ch2\u003eRelated Products\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/marisolmarine.com\/products\/mercruiser-screw-250-20-x-625-14070\"\u003eMercury MerCruiser Screw .250-20 × .625 — 14070\u003c\/a\u003e — 1\/4\"-20 UNC screw for Mercury \/ MerCruiser assemblies\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/marisolmarine.com\/products\/merc-66\"\u003eMercury MerCruiser Quicksilver Screw .312-24 × 1.12 — 20639\u003c\/a\u003e — Fine-thread 5\/16\"-24 screw variant\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/marisolmarine.com\/products\/merc-99\"\u003eMercury MerCruiser Quicksilver Screw .312-18 × 3.500 — 74822\u003c\/a\u003e — Same thread, longer 3.5\" length variant\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/marisolmarine.com\/products\/merc-97\"\u003eMercury MerCruiser Quicksilver Stainless Screw 28635\u003c\/a\u003e — Stainless OEM screw for corrosion-critical positions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e This screw is the correct choice when the Mercury or MerCruiser parts diagram specifically calls out \u003cstrong\u003e10-25299\u003c\/strong\u003e and an OEM-spec fastener is required. Because this part is no longer in production, it's worth ordering a small quantity of spares if you're servicing an assembly that uses it in multiple positions — once current stock is gone, a cross-reference to a standard 5\/16\"-18 × 3\/4\" grade fastener with the correct finish may be the only option. Always verify thread pitch and length against the diagram before substituting.\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563841355812,"sku":"25299","price":0.58,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/f7878c12-a64c-4356-90ea-7cc3db49e53a.png?v=1786482130","url":"https:\/\/marisolmarine.com\/products\/merc-85","provider":"Marisol Marine Company","version":"1.0","type":"link"}