{"product_id":"ez-loader-3-8-16-zinc-locknut-290-002579","title":"Locknut 3\/8\"-16 Hex Zinc Plated 290-002579","description":"\u003ch2\u003e\u003cstrong\u003eZinc-Plated Trailer Locknut \/ Nylock Nut\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eLocknut 3\/8\"-16 Hex Zinc Plated 290-002579\u003c\/strong\u003e is a replacement locknut used on compatible EZ Loader boat trailer hardware applications. This \u003cstrong\u003eEZ Loader locknut\u003c\/strong\u003e is commonly used where a 3\/8\"-16 threaded fastener requires a locking nut to help keep trailer hardware secure.\u003c\/p\u003e\n\u003cp\u003eThis part is also commonly referred to as a \u003cstrong\u003enylock nut\u003c\/strong\u003e, \u003cstrong\u003enylon locknut\u003c\/strong\u003e, or \u003cstrong\u003e3\/8\"-16 hex locknut\u003c\/strong\u003e. It is zinc plated for corrosion resistance in general trailer service.\u003c\/p\u003e\n\u003cp\u003eCommon fitment applications may include select \u003cstrong\u003ejon boat trailers\u003c\/strong\u003e, \u003cstrong\u003ePWC trailers\u003c\/strong\u003e, and small accessory mounting locations on certain EZ Loader trailer models. Always confirm the hardware size, thread pitch, and mounting location before ordering.\u003c\/p\u003e\n\u003cp\u003eThis is a small hardware item, but correct thread size matters. Always confirm the bolt diameter, thread pitch, bracket style, mounting location, and original EZ Loader trailer hardware before ordering.\u003c\/p\u003e\n\u003cp\u003eThis is not a complete bracket, U-bolt kit, bunk assembly, roller assembly, or suspension kit. It is one 3\/8\"-16 zinc-plated hex locknut unless otherwise stated.\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 style=\"text-align: left; padding: 12px 14px; background: #12344d; color: #ffffff; font-size: 18px; border: 1px solid #d9e2e8;\" colspan=\"2\"\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: #f8fbfc;\"\u003ePart Number:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003e290-002579\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #f8fbfc;\"\u003eFits:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eCompatible EZ Loader trailer hardware applications using a 3\/8\"-16 hex locknut. Some fitment applications may include select jon boat trailers, PWC trailers, and small accessory mounting locations on certain trailer models. Confirm bolt size, thread pitch, and mounting location before ordering.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #f8fbfc;\"\u003ePart Type:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eLocknut \/ Nylock 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: #f8fbfc;\"\u003eManufacturer:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eEZ Loader\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #f8fbfc;\"\u003eThread Size:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003e3\/8\"-16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #f8fbfc;\"\u003eNut Style:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eHex locknut \/ nylon insert locknut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #f8fbfc;\"\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: #f8fbfc;\"\u003eColor:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eSilver zinc finish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #f8fbfc;\"\u003eApplication Type:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eTrailer hardware \/ fastening component\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #f8fbfc;\"\u003eCommon Trailer Applications:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eSelect jon boat trailers, PWC trailers, small boat trailer hardware locations, and small accessory mounting points on certain EZ Loader trailer models when the 3\/8\"-16 thread size matches.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #f8fbfc;\"\u003ePackage Size:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003e9\" x 7\" x 2\" padded envelope \/ store default\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #f8fbfc;\"\u003eProduct Weight:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003e13 oz listed packaged shipping weight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #f8fbfc;\"\u003eIncluded:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eOne 3\/8\"-16 zinc-plated hex locknut unless otherwise stated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #f8fbfc;\"\u003eFunction:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eHelps secure compatible 3\/8\"-16 trailer bolts and hardware where a locking nut is required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; font-weight: bold; border: 1px solid #d9e2e8; background: #f8fbfc;\"\u003eCommonly Used With:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eTrailer brackets, bunk hardware, roller hardware, small accessory mounts, suspension hardware, frame hardware, U-bolts, and compatible 3\/8\"-16 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: #f8fbfc;\"\u003eWhy Buyers Like This Part:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eCorrect 3\/8\"-16 thread size, zinc-plated finish, locking nut design, and useful replacement hardware for compatible EZ Loader trailer 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: #f8fbfc;\"\u003eImportant Fitment Note:\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eConfirm part number 290-002579, bolt diameter, 3\/8\"-16 thread pitch, hardware location, and trailer application before ordering.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEZ Loader replacement trailer locknut\u003c\/li\u003e\n\u003cli\u003ePart number 290-002579\u003c\/li\u003e\n\u003cli\u003e3\/8\"-16 thread size\u003c\/li\u003e\n\u003cli\u003eHex locknut \/ nylock-style nut\u003c\/li\u003e\n\u003cli\u003eZinc-plated steel finish\u003c\/li\u003e\n\u003cli\u003eUsed with compatible trailer brackets, hardware, and fastening points\u003c\/li\u003e\n\u003cli\u003eCommon fitment may include select jon boat trailers, PWC trailers, and small accessory mounting locations\u003c\/li\u003e\n\u003cli\u003eUseful when replacing worn, missing, rusted, or damaged trailer hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTypical EZ Loader Trailer Applications\u003c\/h3\u003e\n\u003cp\u003eThis 3\/8\"-16 zinc-plated locknut is used on compatible EZ Loader trailer hardware applications. Some fitment applications may include select jon boat trailers, PWC trailers, small boat trailer hardware locations, and small accessory mounting points on certain EZ Loader trailer models.\u003c\/p\u003e\n\u003cp\u003eIt may also be found around bunk brackets, roller brackets, suspension hardware, frame hardware, support brackets, or other mounting points that use matching 3\/8\"-16 threaded hardware.\u003c\/p\u003e\n\u003cp\u003eAlways compare the part number, bolt size, thread pitch, nut style, and hardware location before ordering.\u003c\/p\u003e\n\u003ch3\u003eWhy This Locknut Matters\u003c\/h3\u003e\n\u003cp\u003eBoat trailers operate in wet, vibrating, and road-exposed environments. A proper locknut helps keep compatible hardware secure where a standard nut may loosen more easily. If a nut is missing, damaged, rounded, rusted, or no longer locking correctly, it should be replaced with the correct size and style.\u003c\/p\u003e\n\u003ch3\u003eInstallation Considerations\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm the bolt is 3\/8\"-16 before ordering.\u003c\/li\u003e\n\u003cli\u003eDo not force the nut onto damaged or mismatched threads.\u003c\/li\u003e\n\u003cli\u003eInspect the matching bolt, bracket, washer, and mounting area during service.\u003c\/li\u003e\n\u003cli\u003eReplace severely corroded or stretched hardware as needed.\u003c\/li\u003e\n\u003cli\u003eUse proper torque practices for the trailer application.\u003c\/li\u003e\n\u003cli\u003eAfter service, recheck the hardware after towing or launching if the application requires it.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment Guidance\u003c\/h3\u003e\n\u003cp\u003eThis is not a universal nut for every trailer bolt. Correct fitment depends on bolt diameter, thread pitch, nut style, hardware location, and the original EZ Loader trailer setup.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm part number 290-002579 when possible.\u003c\/li\u003e\n\u003cli\u003eConfirm the thread size is 3\/8\"-16.\u003c\/li\u003e\n\u003cli\u003eCompare the old locknut to the new part before ordering.\u003c\/li\u003e\n\u003cli\u003eCheck whether the application requires washers or other hardware.\u003c\/li\u003e\n\u003cli\u003eConfirm whether the hardware location is on a jon boat trailer, PWC trailer, accessory mount, bracket, frame, or suspension area.\u003c\/li\u003e\n\u003cli\u003eSend photos if you are unsure about fitment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAssociated \/ Compatible Parts\u003c\/h3\u003e\n\u003cp\u003eThese components are commonly inspected or serviced when replacing trailer locknuts and will be linked as available.\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 style=\"padding: 12px 14px; background: #12344d; color: #ffffff; border: 1px solid #d9e2e8;\"\u003ePart Description\u003c\/th\u003e\n\u003cth style=\"padding: 12px 14px; background: #12344d; color: #ffffff; border: 1px solid #d9e2e8;\"\u003ePart Number\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eCompatible 3\/8\"-16 Bolts\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eConfirm by application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eWashers \/ Flat Washers\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eConfirm by hardware setup\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eBunk \/ Roller Bracket Hardware\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eConfirm by trailer application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eSuspension \/ Frame Hardware\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eConfirm by trailer application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eAccessory Mounting Hardware\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 14px; border: 1px solid #d9e2e8;\"\u003eConfirm by mounting location\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eReal-World Insight\u003c\/h3\u003e\n\u003cp\u003eSmall trailer hardware matters. When replacing a locknut, inspect the full fastening point instead of replacing only the missing nut. If the bolt, bracket, washer, or mounting hole is worn or badly corroded, the new locknut may not solve the real issue.\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, and help customers across the country match EZ Loader trailer parts correctly.\u003c\/p\u003e\n\u003cp\u003eCall us before ordering if you are unsure. Photos, measurements, trailer information, and VIN details can help us verify fitment faster.\u003c\/p\u003e\n\u003cp\u003eNeed help identifying your trailer style or where a part is located? Our legacy trailer reference site at \u003ca rel=\"noopener\" href=\"https:\/\/411marine.com\" target=\"_blank\"\u003e411Marine\u003c\/a\u003e may help you find similar EZ Loader trailer examples.\u003c\/p\u003e\n\u003cp\u003eFor an overview of our company profile, business background, and code of ethics, visit \u003ca rel=\"noopener\" href=\"https:\/\/411-trailers.com\" target=\"_blank\"\u003e411-Trailers.\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat to Have Ready When You Call\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eTrailer year, make, and model, if known\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTrailer VIN, if available\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePart number from the original hardware, if available\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBolt diameter and thread pitch\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePhotos of the nut, bolt, bracket, accessory mount, and mounting location\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"EZ Loader","offers":[{"title":"Default Title","offer_id":52897107607917,"sku":"290-002579","price":1.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0966\/3761\/6493\/files\/EZLoader290-002579HexLocknutZinc3-8in-16TPISideShot.jpg?v=1779305139","url":"https:\/\/ezloaderparts411.com\/products\/ez-loader-3-8-16-zinc-locknut-290-002579","provider":"EZLoaderParts411.com","version":"1.0","type":"link"}