{"product_id":"volvo-1453","title":"Volvo Penta Lock Nut - 990990","description":"\u003cp\u003eThe Volvo Penta \u003cstrong\u003e990990\u003c\/strong\u003e is a genuine Volvo Penta OEM \u003cstrong\u003elock nut\u003c\/strong\u003e used as diagram-specific structural hardware on select Volvo Penta diesel engine, sterndrive, and transom shield assemblies. This locking fastener is used where the Volvo Penta parts diagram calls for \u003cstrong\u003e990990\u003c\/strong\u003e, helping secure components exposed to vibration, clamp load, and marine operating stress in engine, drive, and shield hardware locations.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Volvo Penta factory OEM lock nut.\u003c\/li\u003e\n\u003cli\u003eVolvo Penta part number: \u003cstrong\u003e990990\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eStructural locking fastener for select Volvo Penta marine engine, drive, and transom shield assemblies.\u003c\/li\u003e\n\u003cli\u003eListed weight: \u003cstrong\u003e0.03 lb\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eUsed in vibration-sensitive mounting and fastening locations where a locking nut is specified.\u003c\/li\u003e\n\u003cli\u003eCommonly associated with select D6 diesel, DPH-E, DPI-A, and transom shield hardware diagrams.\u003c\/li\u003e\n\u003cli\u003eReplaces older Volvo Penta part reference \u003cstrong\u003e971084\u003c\/strong\u003e where confirmed by serial number and diagram.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eApplication Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eCommon where-used application groups include select Volvo Penta assemblies by model, serial number, and diagram location, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eD6-300I-G\u003c\/strong\u003e applications where specified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD6-340I-G\u003c\/strong\u003e applications where specified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD6-380I-G\u003c\/strong\u003e applications where specified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD6-440I-G\u003c\/strong\u003e applications where specified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD6-440I-WJ-G\u003c\/strong\u003e applications where specified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eD6-480I-G\u003c\/strong\u003e applications where specified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDPH-E\u003c\/strong\u003e sterndrive applications where specified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDPI-A\u003c\/strong\u003e sterndrive applications where specified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTSK DPH-E\u003c\/strong\u003e transom shield assemblies where specified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTSK DPI-A\u003c\/strong\u003e transom shield assemblies where specified\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUse this lock nut only where the Volvo Penta parts diagram specifically calls for \u003cstrong\u003e990990\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eFitment Notice\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eConfirm fitment by Volvo Penta engine serial number, drive model, transom shield assembly, fastener location, and exact parts diagram before ordering. Volvo Penta uses similar lock nuts and structural fasteners across multiple D6, drive, bracket, and shield assemblies, so thread size or appearance alone is not enough to confirm fitment.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eReplace this lock nut if the original fastener is missing, corroded, rounded, cross-threaded, stretched, damaged, or no longer holds its locking tension. It should also be replaced whenever the Volvo Penta service procedure requires new locking hardware after disassembly, especially in high-vibration engine, drive, and transom shield locations.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eInstall this nut only in the exact diagram location that calls for \u003cstrong\u003e990990\u003c\/strong\u003e. Inspect the matching stud or bolt, washer stack, bracket, shield surface, drive mounting hardware, and surrounding components before reassembly. Do not substitute a standard non-locking nut in structural or vibration-sensitive locations. Follow the Volvo Penta service manual for the correct torque value, thread condition, washer placement, and any required locking procedure for the specific assembly.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAlternate\/Superseded Part Numbers\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e990990\u003c\/strong\u003e — Volvo Penta lock nut\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e971084\u003c\/strong\u003e — older Volvo Penta reference; verify by serial number and diagram before substitution\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eParts Desk Insight\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eLock nuts used on Volvo Penta drive and transom shield assemblies are small but important service parts. Once the locking feature has been used, worn, or damaged during removal, replacing the nut helps maintain proper clamp security in a vibration-heavy marine environment. Matching the fastener by Volvo Penta part number and diagram location helps keep the hardware stack correct.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e Ships same or next day for fast Canada wide shipping. ⚓\u003c\/p\u003e","brand":"VOL","offers":[{"title":"Default Title","offer_id":43564073353252,"sku":"990990","price":4.9,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/8f9b746e-2f69-4d7a-9e66-bf8dcccdcfff.png?v=1781111861","url":"https:\/\/marisolmarine.com\/products\/volvo-1453","provider":"Marisol Marine Company","version":"1.0","type":"link"}