--- product_id: 431904242 title: "Trailer U Bolt Kit – 7 Inch U Bolt for 7,000 lb Trailer Axle, 3\" Round Axle, 7” Long U-Bolts, 1/2” Diameter- U Bolt Kit for 5,200-7000 lbs, Trailer Leaf Spring U Bolts, U Bolts 3 inch Wide" brand: "m-parts" price: "€ 120.45" currency: EUR in_stock: true category: "M Parts" url: https://www.desertcart.at/products/431904242-trailer-u-bolt-kit-7-inch-u-bolt-for-7 store_origin: AT region: Austria --- # 7" long, heavy-duty U-bolts Fits 3" round axles, 5,200-7,000 lb capacity Includes plates, nuts & washers for secure fit Trailer U Bolt Kit – 7 Inch U Bolt for 7,000 lb Trailer Axle, 3" Round Axle, 7” Long U-Bolts, 1/2” Diameter- U Bolt Kit for 5,200-7000 lbs, Trailer Leaf Spring U Bolts, U Bolts 3 inch Wide **Brand:** m-parts **Price:** € 120.45 **Availability:** ✅ In Stock ## Summary > 🔧 Secure your load, own the road – Trailer strength you can trust! ## Quick Answers - **What is this?** Trailer U Bolt Kit – 7 Inch U Bolt for 7,000 lb Trailer Axle, 3" Round Axle, 7” Long U-Bolts, 1/2” Diameter- U Bolt Kit for 5,200-7000 lbs, Trailer Leaf Spring U Bolts, U Bolts 3 inch Wide by m-parts - **How much does it cost?** € 120.45 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/431904242-trailer-u-bolt-kit-7-inch-u-bolt-for-7) ## Best For - m-parts enthusiasts ## Why This Product - Trusted m-parts brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile Plate Sizes:** U-bolt plates fit 1-3/4" or 2" leaf springs for flexible compatibility. - • **Perfect Fit for 3" Axles:** Specifically designed for 3-inch round trailer axles supporting up to 7,000 lbs. - • **Complete Installation Kit:** Includes 4 U-bolts, 2 plates, 8 hex nuts, and 8 washers for hassle-free assembly. - • **Trusted by Pros & DIYers Alike:** Top-rated with 4.3 stars, a must-have upgrade for reliable trailer performance. - • **Built to Last with Grade 5 Strength:** Premium zinc finish and Grade 5 hardness ensure durability under heavy loads. ## Overview The M-Parts Trailer U Bolt Kit features four 7-inch long, 1/2-inch diameter Grade 5 U-bolts with zinc finish, designed for 3-inch round axles supporting 5,200 to 7,000 lbs. This comprehensive kit includes plates for 1-3/4" or 2" leaf springs, hex nuts, and washers, delivering a durable, professional-grade solution for trailer axle security and stability. ## Description 7” Long U-bolts, U-Bolt Plates for 1-3/4” or 2”, 3” width ½-20 Hex Nuts ## Features - INCULDED – Four 7” Long U-Bolts, Two U-Bolt Plates for 1-3/4” or 2”, Eight ½-20 Hex Nuts, Eight Washers - SPECIFICATIONS - 7” Long U-bolts, U-Bolt Plates for 1-3/4” or 2”, 3” width ½-20 Hex Nuts - TRAILER AXLES – U-Bolt Kit for 5,200 – 7000 lb Trailer Axles - PART NUMBER – MATAPUBR-8 - M-PARTSAUTO- M-Parts Auto specializes in trailer parts & accessories using the highest quality materials ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09YJ53KY7 | | Best Sellers Rank | #3,768,641 in Automotive ( See Top 100 in Automotive ) #984 in Automotive Replacement Axle U-Bolt Kits | | Brand | M-Parts | | Color | Black | | Compatible Groove Diameter | 3 inches | | Customer Reviews | 4.3 4.3 out of 5 stars (36) | | Exterior Finish | Zinc | | Fastener Size | 1/2-20 | | Fastener Type | U-Bolt | | Head Type | U-Bolt | | Item Diameter | 0.5 inches | | Item Hardness | Grade 5 | | Manufacturer | MAT | | Manufacturer Grade | premium | | Number of Pieces | 24 | | Outside Diameter | 3 inches | | Part Number | MATAPUBR-8 | | Screw Head Style | Hex, Round, U-Bolt | | Set Name | M-Parts Trailer U Bolt Kit | | Size Name | 1/2-20 | | Thread Size | 1/2 inches 20 | | Thread Style | Right Hand | | Thread Type | Un | | UPC | 600310923473 | | Unit Count | 1 Count | ## Product Details - **Color:** Black - **Exterior Finish:** Zinc - **Head Style:** Hex, Round, U-Bolt - **Manufacturer Grade:** premium - **Thread Size:** 1/2 inches 20 ## Images ![Trailer U Bolt Kit – 7 Inch U Bolt for 7,000 lb Trailer Axle, 3" Round Axle, 7” Long U-Bolts, 1/2” Diameter- U Bolt Kit for 5,200-7000 lbs, Trailer Leaf Spring U Bolts, U Bolts 3 inch Wide - Image 1](https://m.media-amazon.com/images/I/41EYiR-WAqL.jpg) ![Trailer U Bolt Kit – 7 Inch U Bolt for 7,000 lb Trailer Axle, 3" Round Axle, 7” Long U-Bolts, 1/2” Diameter- U Bolt Kit for 5,200-7000 lbs, Trailer Leaf Spring U Bolts, U Bolts 3 inch Wide - Image 2](https://m.media-amazon.com/images/I/31-gvvn+5FL.jpg) ![Trailer U Bolt Kit – 7 Inch U Bolt for 7,000 lb Trailer Axle, 3" Round Axle, 7” Long U-Bolts, 1/2” Diameter- U Bolt Kit for 5,200-7000 lbs, Trailer Leaf Spring U Bolts, U Bolts 3 inch Wide - Image 3](https://m.media-amazon.com/images/I/31p8ofgihTL.jpg) ![Trailer U Bolt Kit – 7 Inch U Bolt for 7,000 lb Trailer Axle, 3" Round Axle, 7” Long U-Bolts, 1/2” Diameter- U Bolt Kit for 5,200-7000 lbs, Trailer Leaf Spring U Bolts, U Bolts 3 inch Wide - Image 4](https://m.media-amazon.com/images/I/31+bZoLC0fL.jpg) ![Trailer U Bolt Kit – 7 Inch U Bolt for 7,000 lb Trailer Axle, 3" Round Axle, 7” Long U-Bolts, 1/2” Diameter- U Bolt Kit for 5,200-7000 lbs, Trailer Leaf Spring U Bolts, U Bolts 3 inch Wide - Image 5](https://m.media-amazon.com/images/I/31RYZZn-ANL.jpg) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.at/products/431904242-trailer-u-bolt-kit-7-inch-u-bolt-for-7](https://www.desertcart.at/products/431904242-trailer-u-bolt-kit-7-inch-u-bolt-for-7) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-10-30*