{"title":"U-Bolt Kit","description":"\u003cp\u003eDAT HOIST offers durable \u003cstrong\u003eTrailer U-Bolt Kits\u003c\/strong\u003e designed to securely fasten trailer axles to compatible leaf spring suspension systems. Available for a range of axle capacities and tube sizes, these kits provide the essential mounting hardware needed for trailer axle installation, replacement, and suspension upgrades.\u003c\/p\u003e\n\u003cp\u003eChoose from \u003cstrong\u003eU-Bolt Kits for 3,500 lb, 5,200–7,000 lb, and 8,000 lb trailer axles\u003c\/strong\u003e, with options designed for \u003cstrong\u003e2-3\/8″, 3″, and 3-1\/2″ axle tubes\u003c\/strong\u003e. Whether you're building a new trailer or replacing worn suspension hardware, DAT HOIST U-bolt kits provide a reliable fit for compatible utility trailers, dump trailers, equipment trailers, and other towing applications.\u003c\/p\u003e\n\u003cp\u003eShop \u003cstrong\u003eTrailer U-Bolt Kits\u003c\/strong\u003e by axle capacity and tube size to find the right hardware for your trailer suspension setup.\u003c\/p\u003e","products":[{"product_id":"3-5k-trailer-axle-u-bolt-kit-2-3-8-round-axle-1-3-4-leaf-spring","title":"3500 lb 1\/2\" U-Bolt Kit for 2 3\/8\" Tube Trailer Axles","description":"\u003ch3 data-start=\"83\" data-end=\"167\"\u003e\u003cstrong\u003e3.5K Trailer Axle U-Bolt Kit – Fits 2-3\/8\" Round Axles | For 1-3\/4\" Leaf Springs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eDescription:\u003c\/p\u003e\n\u003cp\u003eEnsure smooth, secure suspension for your trailer with this 3,500 lb axle U-bolt kit. Designed to mount 1-3\/4\" leaf springs to 2-3\/8\" round axles, this complete hardware set is compatible with most 3.5K trailer axles including those from Dexter, TK, and Rockwell American. Ideal for trailer builds or suspension repairs, each component is made from durable steel to deliver long-lasting performance.\u003c\/p\u003e\n\u003cp\u003eSpecifications:\u003c\/p\u003e\n\u003cul data-start=\"617\" data-end=\"916\"\u003e\n\u003cli data-start=\"617\" data-end=\"672\"\u003eU-Bolts (Qty: 4): 5-1\/2\" long, fits 2-3\/8\" axle\u003c\/li\u003e\n\u003cli data-start=\"673\" data-end=\"714\"\u003eHex Nuts (Qty: 8): 1\/2\"-20 thread\u003c\/li\u003e\n\u003cli data-start=\"715\" data-end=\"784\"\u003eTie Plates (Qty: 2): Compatible with 1-3\/4\" wide leaf springs\u003c\/li\u003e\n\u003cli data-start=\"785\" data-end=\"832\"\u003eAxle Compatibility: 3.5K (2-3\/8\" round)\u003c\/li\u003e\n\u003cli data-start=\"833\" data-end=\"916\"\u003eFinish: Raw steel (may arrive with minor rust\/oil, clean before installation)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eKey Features:\u003c\/p\u003e\n\u003cul data-start=\"946\" data-end=\"1333\"\u003e\n\u003cli data-start=\"946\" data-end=\"1031\"\u003eWide Compatibility: Fits most 3,500 lb trailer axles from major manufacturers\u003c\/li\u003e\n\u003cli data-start=\"1032\" data-end=\"1111\"\u003eComplete Mounting Kit: Includes all necessary U-bolts, nuts, and plates\u003c\/li\u003e\n\u003cli data-start=\"1112\" data-end=\"1196\"\u003eHeavy-Duty Steel: Built for durability and resistance to trailer road stress\u003c\/li\u003e\n\u003cli data-start=\"1197\" data-end=\"1273\"\u003eEasy Installation: Perfect for both new builds and axle replacements\u003c\/li\u003e\n\u003cli data-start=\"1274\" data-end=\"1333\"\u003eSpring Seats Required: Not included (sold separately)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIdeal For:\u003c\/p\u003e\n\u003cul data-start=\"1359\" data-end=\"1475\"\u003e\n\u003cli data-start=\"1359\" data-end=\"1379\"\u003eUtility trailers\u003c\/li\u003e\n\u003cli data-start=\"1380\" data-end=\"1398\"\u003eCargo trailers\u003c\/li\u003e\n\u003cli data-start=\"1399\" data-end=\"1416\"\u003eBoat trailers\u003c\/li\u003e\n\u003cli data-start=\"1417\" data-end=\"1438\"\u003eEquipment haulers\u003c\/li\u003e\n\u003cli data-start=\"1439\" data-end=\"1475\"\u003eTrailer repair \u0026amp; fabrication shops\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DAT HOIST","offers":[{"title":"Default Title","offer_id":51057275830585,"sku":"35UBKT","price":34.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0931\/7947\/8329\/files\/1_0c7a6936-4c89-4091-bfaf-ba02ee7eb65d.jpg?v=1775717756"},{"product_id":"5-2k-7k-trailer-axle-u-bolt-kit-3-inch-round-axle","title":"5200 - 7000 lb 1\/2\" U-Bolt Kit for 3\" Tube Trailer Axles","description":"\u003ch3 data-start=\"63\" data-end=\"152\"\u003e\u003cstrong\u003e5200 - 7000 lb Trailer Axle U-Bolt Kit – Fits 3\" Round Axles | For 1-3\/4\" or 2\" Leaf Springs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eDescription:\u003c\/p\u003e\n\u003cp\u003eThis heavy-duty trailer axle U-bolt kit is designed to securely mount your 1-3\/4\" or 2\" wide leaf springs to a 3\" round axle, ideal for 5,200 lb to 7,000 lb trailer axles. Whether you're building a new trailer or upgrading an existing one, this kit includes all the essential components for a reliable suspension setup.\u003c\/p\u003e\n\u003cp data-start=\"499\" data-end=\"520\"\u003eSpecifications:\u003c\/p\u003e\n\u003cul data-start=\"522\" data-end=\"836\"\u003e\n\u003cli data-start=\"522\" data-end=\"555\"\u003eU-Bolts (Qty: 4): 7\" Long\u003c\/li\u003e\n\u003cli data-start=\"556\" data-end=\"618\"\u003eU-Bolt Plates (Qty: 2): Fits 1-3\/4\" or 2\" leaf springs\u003c\/li\u003e\n\u003cli data-start=\"619\" data-end=\"660\"\u003eHex Nuts (Qty: 8): 1\/2\"-20 thread\u003c\/li\u003e\n\u003cli data-start=\"661\" data-end=\"765\"\u003eU-Bolt Dimensions:\n\u003cul data-start=\"690\" data-end=\"765\"\u003e\n\u003cli data-start=\"690\" data-end=\"712\"\u003eLength (L): 7\"\u003c\/li\u003e\n\u003cli data-start=\"715\" data-end=\"736\"\u003eWidth (A): 3\"\u003c\/li\u003e\n\u003cli data-start=\"739\" data-end=\"765\"\u003eDiameter (D): 1\/2\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"766\" data-end=\"836\"\u003eAxle Compatibility: 3\" round axles (typically for 5.2K–7K axles)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"843\" data-end=\"864\"\u003eKey Features:\u003c\/p\u003e\n\u003cul data-start=\"866\" data-end=\"1264\"\u003e\n\u003cli data-start=\"866\" data-end=\"958\"\u003eComplete Suspension Mount Kit: Includes all necessary hardware to mount leaf springs\u003c\/li\u003e\n\u003cli data-start=\"959\" data-end=\"1051\"\u003eHigh Compatibility: Works with most 5,200–7,000 lb trailer axles from leading brands\u003c\/li\u003e\n\u003cli data-start=\"1052\" data-end=\"1129\"\u003eDurable Steel Construction: Built to handle demanding load conditions\u003c\/li\u003e\n\u003cli data-start=\"1130\" data-end=\"1191\"\u003eSpring Seats Required: Not included (sold separately)\u003c\/li\u003e\n\u003cli data-start=\"1192\" data-end=\"1264\"\u003eEasy Installation: Perfect for trailer fabrication or repair shops\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1271\" data-end=\"1288\"\u003eIdeal For:\u003c\/p\u003e\n\u003cul data-start=\"1290\" data-end=\"1398\"\u003e\n\u003cli data-start=\"1290\" data-end=\"1310\"\u003eUtility trailers\u003c\/li\u003e\n\u003cli data-start=\"1311\" data-end=\"1333\"\u003eEquipment trailers\u003c\/li\u003e\n\u003cli data-start=\"1334\" data-end=\"1356\"\u003eGooseneck trailers\u003c\/li\u003e\n\u003cli data-start=\"1357\" data-end=\"1374\"\u003eCargo haulers\u003c\/li\u003e\n\u003cli data-start=\"1375\" data-end=\"1398\"\u003eAgricultural trailers\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DAT HOIST","offers":[{"title":"Default Title","offer_id":51057337303353,"sku":"5207UBKT12","price":40.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0931\/7947\/8329\/files\/1_4460f373-d33a-4284-b06c-5dff53137326.jpg?v=1775717782"},{"product_id":"5-2k-7k-trailer-axle-u-bolt-kit-3-inch-round-axle-9-16","title":"8000 lb 9\/16\" U-Bolt Kit for 3 1\/2\" Tube Trailer Axles","description":"\u003ch3 data-start=\"63\" data-end=\"160\"\u003e\u003cstrong\u003e8000lb Trailer Axle U-Bolt Kit – Fits \u003cspan\u003e3 1\/2\"\u003c\/span\u003eRound Axles | 9\/16\" Nuts | For 2\" Springs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"162\" data-end=\"600\"\u003eDescription:\u003c\/p\u003e\n\u003cp data-start=\"162\" data-end=\"600\"\u003eThis trailer axle U-bolt kit is designed for securely mounting  2\" wide leaf springs to a 3- 1\/2\" round axle, making it a perfect fit for 8,000 lb axles. The kit includes 8\" long U-bolts, heavy-duty mounting plates, and 9\/16\"-18 hex nuts. Whether you're building a new trailer or replacing worn components, this kit provides everything needed—except spring seats—for a secure and stable leaf spring setup.\u003c\/p\u003e\n\u003cp\u003eSpecifications:\u003c\/p\u003e\n\u003cul data-start=\"630\" data-end=\"948\"\u003e\n\u003cli data-start=\"630\" data-end=\"667\"\u003eU-Bolts (Qty: 4): 8\" Long\u003c\/li\u003e\n\u003cli data-start=\"668\" data-end=\"725\"\u003eU-Bolt Plates (Qty: 2): \u003cspan\u003eU-Bolt plates for 2\" springs\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"726\" data-end=\"768\"\u003eHex Nuts (Qty: 8): 9\/16\"-18 thread\u003c\/li\u003e\n\u003cli data-start=\"726\" data-end=\"768\"\u003eSpring Washer(Qty: 8)\u003c\/li\u003e\n\u003cli\u003eFlat Washer(Qty: 8)\u003c\/li\u003e\n\u003cli data-start=\"769\" data-end=\"878\"\u003eU-Bolt Dimensions:\n\u003cul data-start=\"798\" data-end=\"878\"\u003e\n\u003cli data-start=\"798\" data-end=\"824\"\u003eLength (L): \u003cspan\u003e8\" \u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"827\" data-end=\"848\"\u003eWidth (A): 3\"\u003c\/li\u003e\n\u003cli data-start=\"851\" data-end=\"878\"\u003eDiameter (D): 9\/16\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"879\" data-end=\"948\"\u003eAxle Compatibility: \u003cspan\u003e3 1\/2\" \u003c\/span\u003eround axle (typically for 8K axles)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eKey Features:\u003c\/p\u003e\n\u003cul data-start=\"978\" data-end=\"1366\"\u003e\n\u003cli data-start=\"978\" data-end=\"1070\"\u003eComplete Mounting Kit: Includes everything needed to attach leaf springs to the axle\u003c\/li\u003e\n\u003cli data-start=\"1071\" data-end=\"1140\"\u003eHeavy-Duty Fit: Ideal for high-load trailers and frequent use\u003c\/li\u003e\n\u003cli data-start=\"1141\" data-end=\"1232\"\u003eBroad Compatibility: Works with most \u003cspan\u003e3 1\/2\"\u003c\/span\u003e axles from \u003c\/li\u003e\n\u003cli data-start=\"1233\" data-end=\"1292\"\u003eSpring Seats Required: Not included—sold separately\u003c\/li\u003e\n\u003cli data-start=\"1293\" data-end=\"1366\"\u003eTrailer Ready: A great choice for trailer builders or service techs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIdeal For:\u003c\/p\u003e\n\u003cul data-start=\"1392\" data-end=\"1537\"\u003e\n\u003cli data-start=\"1392\" data-end=\"1414\"\u003eEquipment trailers\u003c\/li\u003e\n\u003cli data-start=\"1415\" data-end=\"1437\"\u003eGooseneck trailers\u003c\/li\u003e\n\u003cli data-start=\"1438\" data-end=\"1472\"\u003eUtility and landscape trailers\u003c\/li\u003e\n\u003cli data-start=\"1473\" data-end=\"1510\"\u003eAgricultural or farm-use trailers\u003c\/li\u003e\n\u003cli data-start=\"1511\" data-end=\"1537\"\u003eCommercial cargo haulers\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DAT HOIST","offers":[{"title":"Default Title","offer_id":51057358700857,"sku":"08UBKT","price":44.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0931\/7947\/8329\/files\/1_6ae86980-806b-4f65-9984-51220324ab3e.jpg?v=1775717806"}],"url":"https:\/\/dathoist.com\/collections\/u-bolt-kit.oembed","provider":"DAT HOIST","version":"1.0","type":"link"}