{"product_id":"merc-86","title":"Mercury MerCruiser Nut (.312-24) 862902","description":"\u003ch2\u003eGenuine OEM Nut (.312-24) — Part 862902\u003c\/h2\u003e\u003cp\u003eThis genuine OEM nut is engineered to the exact thread specification called out in the Mercury MerCruiser parts diagram — 5\/16\"-24 fine thread, factory dimensions, and correct finish. When your service manual calls for part 862902, this is the correct replacement, not a generic substitute.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 862902\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e .312-24 (5\/16\"-24 fine thread)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine OEM\u003c\/strong\u003e — not aftermarket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Mercury MerCruiser assemblies specifying part 862902\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitment\u003c\/h2\u003e\u003cp\u003eMatch this nut to your Mercury parts diagram using your engine model, serial number, and assembly location. Thread pitch and diameter vary across Mercury hardware — always confirm the part number before ordering.\u003c\/p\u003e\u003ch2\u003eWhen to Replace\u003c\/h2\u003e\u003cp\u003eReplace when the nut shows corrosion, thread damage, rounding, or when it has been removed during service and cannot be reliably retorqued to specification.\u003c\/p\u003e\u003ch2\u003eInstallation\u003c\/h2\u003e\u003cp\u003eClean threads on both the fastener and mating stud before installation. Follow the Mercury service manual for correct torque values, locking compound requirements, and reuse limits.\u003c\/p\u003e\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e The .312-24 fine-thread specification makes this nut a common service item on MerCruiser stern drive and inboard engine assemblies where fine-thread fasteners are used for precise clamping — including drive shaft, gimbal, and bracket hardware. Fine-thread nuts should never be substituted with coarse-thread equivalents; always match the thread pitch exactly to the diagram specification.\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563841519652,"sku":"25594","price":1.35,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/1f1cf854-24c7-45ab-95c8-5bf4706bc613.png?v=1786487856","url":"https:\/\/marisolmarine.com\/products\/merc-86","provider":"Marisol Marine Company","version":"1.0","type":"link"}