{"product_id":"ez-loader-hex-locknut-zinc-plated-290-002598","title":"Hex Locknut 1\/2\"-13 Zinc Plated Grade 5 290-002598","description":"\u003ch2\u003eHex Locknut 1\/2\"-13 Zinc Plated Grade 5 290-002598\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e1\/2\"-13 Trailer Locknut\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eHex Locknut 1\/2\"-13 Zinc Plated Grade 5 290-002598\u003c\/strong\u003e is a replacement trailer hardware fastener used on compatible EZ Loader boat trailers. This locknut is designed for \u003cstrong\u003e1\/2\"-13 coarse-thread bolts, U-bolts, and related trailer hardware\u003c\/strong\u003e where a locking-style nut is required.\u003c\/p\u003e\n\u003cp\u003eThis nut is commonly used in trailer suspension, bracket, bunk, roller, frame, and running gear hardware applications depending on the trailer model and setup. Correct thread size matters because 1\/2\"-13 coarse thread hardware is not interchangeable with 1\/2\"-20 fine thread hardware.\u003c\/p\u003e\n\u003cp\u003eThe zinc-plated finish helps provide corrosion resistance for marine trailer use. Because boat trailers are exposed to road spray, freshwater, saltwater, ramp use, and vibration, replacing worn, corroded, rounded, or questionable fasteners is important during service.\u003c\/p\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 15px; margin: 20px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth colspan=\"2\" style=\"text-align: left; padding: 12px 14px; background: #12344d; color: #ffffff; font-size: 18px; border: 1px solid #d9e2e8;\"\u003eProduct Details\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 32%; padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #eaf3f8;\"\u003ePart Number:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003e290-002598\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #eaf3f8;\"\u003ePart Type:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eNyloc-style hex locknut \/ trailer hardware nut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #eaf3f8;\"\u003eThread Size:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003e1\/2\"-13 TPI coarse thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #eaf3f8;\"\u003eGrade:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eGrade 5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #eaf3f8;\"\u003eMaterial \/ Finish:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eZinc-plated steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #eaf3f8;\"\u003eColor:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eZinc \/ silver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #eaf3f8;\"\u003eFits:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eCompatible EZ Loader trailer applications using 1\/2\"-13 coarse-thread bolts or U-bolts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #eaf3f8;\"\u003eApplication Type:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eBoat trailer hardware, suspension hardware, bracket hardware, and U-bolt fastening applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #eaf3f8;\"\u003eFunction:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eHelps secure compatible 1\/2\"-13 coarse-thread bolts, U-bolts, brackets, and trailer hardware while resisting loosening from vibration and road shock.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #eaf3f8;\"\u003eWhy Buyers Like This Part:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eCommon trailer hardware size, Grade 5 strength, zinc-plated finish, nyloc-style locking action, useful for service work, repairs, and replacing corroded locknuts.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #eaf3f8;\"\u003eImportant Fitment Note:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eConfirm your bolt or U-bolt thread is 1\/2\"-13 coarse thread before ordering. This nut does not fit 1\/2\"-20 fine-thread lug bolts, wheel studs, or fine-thread hardware.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e1\/2\"-13 Hex Locknut Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReplacement 1\/2\"-13 coarse-thread hex locknut for compatible trailer hardware\u003c\/li\u003e\n\u003cli\u003eNyloc-style locking design helps resist loosening from vibration and road shock\u003c\/li\u003e\n\u003cli\u003eGrade 5 zinc-plated steel construction\u003c\/li\u003e\n\u003cli\u003eCommonly used with compatible 1\/2\" trailer bolts and U-bolts\u003c\/li\u003e\n\u003cli\u003eUseful for replacing rusted, rounded, worn, or missing trailer nuts\u003c\/li\u003e\n\u003cli\u003eDesigned for boat trailer hardware service and repair applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTypical EZ Loader Trailer Applications\u003c\/h3\u003e\n\u003cp\u003eThis locknut may be used on compatible EZ Loader trailer hardware where a \u003cstrong\u003e1\/2\"-13 coarse-thread\u003c\/strong\u003e nut is required. Common use areas may include suspension hardware, U-bolt hardware, bunk or bracket hardware, roller hardware, frame-mounted hardware, and other trailer service points depending on the trailer model.\u003c\/p\u003e\n\u003cp\u003eBecause EZ Loader trailers use different fasteners by application, always compare the old nut, bolt, thread pitch, and hardware location before ordering.\u003c\/p\u003e\n\u003ch3\u003eWhy EZ Loader Uses Nyloc-Style Locknuts\u003c\/h3\u003e\n\u003cp\u003eEZ Loader commonly uses nylon-insert locknuts in trailer hardware locations where vibration, road shock, and repeated loading can loosen standard nuts. The nylon insert grips the bolt threads and helps maintain clamping pressure without relying on a separate lock washer.\u003c\/p\u003e\n\u003cp\u003eThis matters on boat trailers because lock washers can flatten, crack, or break under stress. When that happens, a gap can form and hardware may loosen over time. A nyloc-style locknut helps reduce that risk by keeping steady thread pressure on the bolt.\u003c\/p\u003e\n\u003cp\u003eFor best results, replace worn or repeatedly removed locknuts during service, especially on suspension, bunk, bracket, roller, and frame hardware.\u003c\/p\u003e\n\u003ch3\u003eImportant Difference: 1\/2\"-13 vs. 1\/2\"-20\u003c\/h3\u003e\n\u003cp\u003eThis part is a \u003cstrong\u003e1\/2\"-13 coarse-thread locknut\u003c\/strong\u003e. It is not the same as a 1\/2\"-20 fine-thread wheel fastener nut.\u003c\/p\u003e\n\u003cp\u003eMany trailer wheel studs and lug bolts use fine-thread hardware, while many trailer brackets, U-bolts, and frame hardware locations use coarse-thread hardware. If the thread pitch does not match, the nut can cross-thread, strip, or fail to tighten correctly.\u003c\/p\u003e\n\u003ch3\u003eInstallation Considerations\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm the mating bolt or U-bolt is 1\/2\"-13 coarse thread.\u003c\/li\u003e\n\u003cli\u003eDo not force the nut onto fine-thread hardware.\u003c\/li\u003e\n\u003cli\u003eInspect the bolt, U-bolt, bracket, and mounting surface before reassembly.\u003c\/li\u003e\n\u003cli\u003eReplace badly rusted, stretched, rounded, or damaged hardware before towing.\u003c\/li\u003e\n\u003cli\u003eReplace locknuts that have been repeatedly removed and reinstalled, especially in high-vibration trailer locations.\u003c\/li\u003e\n\u003cli\u003eUse the proper wrench or socket to avoid rounding the nut.\u003c\/li\u003e\n\u003cli\u003eTighten hardware to the proper specification for the trailer application.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHex Locknut Fitment Guidance\u003c\/h3\u003e\n\u003cp\u003eThis is not a universal nut for every trailer hardware location.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm the thread size is 1\/2\"-13.\u003c\/li\u003e\n\u003cli\u003eConfirm the hardware application uses a locknut.\u003c\/li\u003e\n\u003cli\u003eConfirm the grade and finish are suitable for the repair location.\u003c\/li\u003e\n\u003cli\u003eCompare the old nut and bolt before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eReal-World Insight\u003c\/h3\u003e\n\u003cp\u003eSmall trailer hardware often causes bigger problems when it is reused past its service life. A corroded or rounded locknut may not clamp properly, and a mismatched thread pitch can damage the bolt or U-bolt. When servicing suspension, bunk, bracket, roller, or frame hardware, replacing questionable locknuts is often cheaper than fighting seized, loose, or damaged hardware later.\u003c\/p\u003e\n\u003ch3\u003eQuestions or Need Help Matching Parts?\u003c\/h3\u003e\n\u003cp\u003eWe’re based in \u003cstrong\u003eHardeeville, South Carolina\u003c\/strong\u003e, serving customers nationwide.\u003c\/p\u003e\n\u003cp\u003e📞 Call us — we answer the phone and help you get it right.\u003cbr\u003e📧 Send photos if needed — often the fastest way to confirm fitment.\u003c\/p\u003e\n\u003cp\u003eWe focus on \u003cstrong\u003ematching parts correctly the first time\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv style=\"border: 1px solid #d9e2e8; background: #f6f9fb; padding: 16px 18px; margin: 24px 0; border-radius: 6px;\"\u003e\n\u003ch3 style=\"margin-top: 0;\"\u003eIndependent EZ Loader Parts Dealer Notice\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEZLoaderParts411.com\u003c\/strong\u003e is operated by the \u003cstrong\u003e411Marine team\u003c\/strong\u003e, an independent brick-and-mortar trailer dealer and distributor resource for EZ Loader trailers, OEM replacement parts, and fitment support.\u003c\/p\u003e\n\u003cp\u003eWe are a dealer resource, not the manufacturer. From our Hardeeville, South Carolina store, we use real trailers, measurements, photos, and hands-on comparison whenever possible to help customers identify the correct EZ Loader parts before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWhat to Have Ready When You Call\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eTrailer year, make, and model\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eVIN, if available\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOld bolt or U-bolt thread size\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eHardware location on the trailer\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePhotos of the existing nut, bolt, bracket, or U-bolt\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EZ Loader","offers":[{"title":"Default Title","offer_id":52897106231661,"sku":"290-002598","price":1.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0966\/3761\/6493\/files\/EZLoader290-002598HexLocknutZinc.5-13TPIFirstShotSlightAbove.jpg?v=1779306745","url":"https:\/\/ezloaderparts411.com\/products\/ez-loader-hex-locknut-zinc-plated-290-002598","provider":"EZLoaderParts411.com","version":"1.0","type":"link"}