{"product_id":"trailer-u-bolt-kit-5-1-2-in-for-3-500-lb-axle-heavy-duty-fit","title":"Trailer U Bolt Kit 5-1\/2 in for 3,500 lb Axle - Heavy Duty Fit","description":"\u003cp\u003eIn this review the Trailer U Bolt Kit is evaluated as a straightforward replacement kit for trailers with a 3,500 lb round axle. The bottom line: this kit is for anyone who needs a reliable, correctly sized set of U-bolts and hardware to secure a 2-3\/8 in axle to 1-3\/4 in leaf springs, and the biggest reason to buy is its correct fit and durable steel construction that simplifies brake alignment and suspension clamping.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExact fit for 3,500 lb axles:\u003c\/strong\u003e The U-bolts are 5-1\/2 in long and sized to work with a 2-3\/8 in axle beam, which removes guesswork when matching parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete hardware set:\u003c\/strong\u003e The kit includes 8 U-bolts, 16 1\/2-20 hex nuts and 4 tie plates so installers have everything needed for both sides of a tandem or single axle setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable steel construction:\u003c\/strong\u003e Robust materials give the clamping hardware the strength required to keep the axle and leaf spring assembly stable under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrosion resistant:\u003c\/strong\u003e The finish helps resist rust and corrosion so the hardware maintains function in trailer conditions over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproves braking and alignment:\u003c\/strong\u003e Proper clamping of the axle helps maintain brake orientation and consistent suspension geometry for safer towing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis kit is aimed at DIY trailer owners, small fleet operators, and repair shops replacing worn U-bolts on trailers that use a 2-3\/8 in round axle rated around 3,500 lb. It is particularly useful when the installer wants a full replacement pack with tie plates and sufficient nuts for both sides without sourcing parts separately.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include owners of trailers with non-round or larger diameter axles, different leaf spring widths, or specialized applications that require custom-length U-bolts or alternative thread sizes. If your axle or springs do not match the listed dimensions, choose a kit sized to your hardware.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGood fit for 2-3\/8 in axle beams and 1-3\/4 in leaf springs, reducing installation adjustments.\u003c\/li\u003e\n\u003cli\u003eComplete set of hardware makes replacements faster and more convenient for both sides of a trailer.\u003c\/li\u003e\n\u003cli\u003eCustomers report solid thread quality and bolt strength, which increases confidence in clamping security.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLimited to the specific axle and spring sizes listed, so it is not a universal kit for all trailers.\u003c\/li\u003e\n\u003cli\u003eFinish is corrosion resistant but installers in very harsh marine environments may prefer stainless alternatives.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003e3,500 lb round axle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAxle beam diameter\u003c\/td\u003e\n\u003ctd\u003e2-3\/8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eU-bolt size\u003c\/td\u003e\n\u003ctd\u003e8 x 5-1\/2 in long, 1\/2 in diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread\u003c\/td\u003e\n\u003ctd\u003e1\/2-20 hex nuts, 2 in thread pitch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTie plates\u003c\/td\u003e\n\u003ctd\u003e4 plates for 1-3\/4 in leaf springs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e2 pack (8 U-bolts, 16 nuts, 4 tie plates)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Trailer U Bolt Kit is a practical, value-oriented replacement pack for trailers with a 2-3\/8 in axle beam and 1-3\/4 in leaf springs. It offers the correct sizing, complete hardware, and durable steel build needed to restore secure clamping and consistent brake alignment, making it a sensible buy for DIYers and shops replacing worn U-bolts.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill these U-bolts fit my axle?\u003c\/strong\u003e\u003cbr\u003eThey fit when your axle beam diameter is 2-3\/8 in and your leaf springs are the 1-3\/4 in width noted; match those sizes before purchasing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the kit include hardware for both sides?\u003c\/strong\u003e\u003cbr\u003eYes, the pack includes 8 U-bolts, 16 nuts and 4 tie plates which cover both sides of a single axle or one side of a tandem setup as needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these stainless steel?\u003c\/strong\u003e\u003cbr\u003eThe kit is built from durable steel with a corrosion-resistant finish; for marine or very corrosive environments consider stainless alternatives.\u003c\/p\u003e","brand":"SPARKWHIZ","offers":[{"title":"Default Title","offer_id":48647306117339,"sku":"B0C89MCPWW","price":44.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71EjkqYi5UL._SL1500_0803c748-0c73-4acd-a1fb-3d933ce033cd.jpg?v=1778654754","url":"https:\/\/gearmusthave.com\/products\/trailer-u-bolt-kit-5-1-2-in-for-3-500-lb-axle-heavy-duty-fit","provider":"GearMustHave","version":"1.0","type":"link"}