Best American Automotive U Bolt Kits in 2026

Package Dimensions: 8.2 H X 40.6 L X 13.6 W (Centimeters).Material:Zinc

Country Of Origin : United States

Package Weight: 2.119 Kilograms

This kit is for 5,200lbs-7,000lbs round axle which axle beam dia 3" . .

4 x 7" long U bolts, U bolts dia. 1/2"

2 x tie plates for 1-3/4" or 2" leaf springs

Compatible with 2001-Current Chevy Gmc 1500 2500 3500 10.5” and 11.5” AAM 14 bolt differentials and 99-current 1500 8.5” 8.6” 10-bolt and 12bolt cover diffs. (1999-newer Avalanche Silverado Sierra Tahoe Yukon Suburban Escalade Trailblazer TBSS Colorado Canyon Express Hummer)

THESE WILL NOT FIT GM 10-bolt 12-bolt 14-bolt Full size Truck Differentials made before the mid to late 90s. Does fit some earlier models (pre 1998) but please be sure to check to see if you have Metric or standard threads. (most metric will have numbers on the head like 8.8 10.9 12.9)

Compatible with 2003-2018 Dodge Ram 2500 with AAM 10.5” or 1150 rear axle, 2003-2018 Ram 3500 with AAM 11.5” Rear Axle, and 2003-2013.5 Ram 2500/3500 4X4 with AAM 9-1/4” 14-bolt beam type front axle.

FITMENT: All makes and models with a single 9/16" axle pin hole and 2.5" leafs that require square 10" extra-long clamp; 4" threads can be cut

CONTENTS: 2 solid US certified cast iron lift blocks with 4 OEM grade steel square bend u-bolts, hi-nuts and security spring washers.

TECHNICAL NOTES: Install the tallest ends of tapered rear blocks to the rear of the vehicle; Retighten u-bolts after the first 500 miles

Stamped & Made in the USA!

For 1 3/4" round axle, bolt length 4", 3/8" diameter.

1 kit does an entire axle

3 Inch Upgrade Replacement Performance Turbo Charged Kit Made of High Quality Light Weight T6061 Aluminum

Black Pipe Diameter: 3"; Pipe Thickness: 1/16 inch (1.58 mm) ; Length: 18 inch (457mm);Working Pressure: 0.3 Mpa (43.5 PSI) to 0.9 Mpa (130.5 PSI)

Perfect for All Turbo DIY Project,Increases Up to 65% Air Flow Compared to Standard Bent Piping

Designed for Specific Differential Applications

Precision Machined Yoke

Package Dimension : 4.064 centimeters L x 16.51 centimeters W x 50.292 centimeters H

Grade 5 equivalent

More Than Just Parts: From snow and ice equipment to toolboxes, hydraulics, towing, truck and trailer hardware to our innovative lighting products-it's amazing what Buyers Products can do for your truck

Axle u bolts KIT is made of heavy-duty steel with a thickness of 1/2", which is more robust and durable

The surface of U-Bolt Kit is zinc, which is more suitable for marine trailers and motor boats in salt water or fresh water.

Fits a 2x3 Axle. this Product to fit around a 2 inch by 3 inch Boat Trailer Axle.

Package Dimensions: 9.4 H X 3 L X 7.9 W (centimeters)

Package quantity: 1

Package Weight: 0.16 kilograms

Replacement axle mounting kit

Available sizes: 1.75", 2.375" and 3"

U-bolt design. As an exact-match component, this product will install just like your original equipment

TRAC’s 12v high-current quick-connect system:

12v connector for rear of vehicle; Adaptor for optional installation in 1-1/2” round hole

U-bracket for optional installation on flat surface; 12v connector for trailer winch or any other 12v device

COMPATIBLE WITH 1999 - 2019 Chevrolet Silverado 1500 and 1999 - 2019 GMC Sierra 1500 (6-Lug / 2WD 4WD)

TECHNICAL NOTES: 1.5-2 inch rear suspension lift, depending on the condition of your leaf packs. (!) NOTE: Longer U-bolts will be required if you don't have minimum 1/2" of thread remaining on factory U-bolts. Please measure your truck's U-bolts before purchasing.

BENEFITS: Our Add-A-Leafs are designed to provide an evenly distributed spring rate, improve the common factory leaf sag caused by heavy loads, and enhance vehicle reliability when towing.

【4 Square U-Bolt Kits】4 U-bolts, 8 hexagon nuts, 4 plates, these additional accessories are galvanized as well. You can spend less time doing your work with these handy tools!

【Quality Stainless Steel Material】Made of 304 Stainless Steel, with great performance in anti-rust and corrosion resistance, the U-bolts can be used outside and withstand harsh weathers.

【High Performance】Strong and durable, rust resistant, moisture resistant, and corrosion resistant. With the burr-free surface and thread good grip, each U clamp still performs well in a rainy and humid seaside environment.

U-bolt Size: 1/2" D x 3-1/16" W x 4-5/16" L, thread length: 2 1/2" inches, suitable for 3*3 square trailer frame

Material Type: 304 stainless steel, all accessories are made of 304 stainless steel

You Can Get: (4) U-shaped bolts, (8) flat washers, (8) lock washers, (8) hexagonal nylon inlay nuts, these are half the price of the hardware store.

Rough Country 5/8" Round U-bolts 3.5 x 10.5 7616

Estimated Install Time: 2 - 3 hours

Includes: 5/8" Round U-bolts -

FITS: Many applications. Please message us if you have any questions

CONTENTS: 4x Square U-Bolts (measurements are from inside the bend 9.5" long and 2.5" wide)

INSTALLATION: Bolt on kit. Please measure current U bolts to confirm dimensions needed

INCULDED – Four 5-1/2” Long U-bolts, Two U-Bolt plates for 1-3/4’ Springs, U-Botls 2-3/8” width for Round Axle, 8 ½-20 Hex Nuts

SPECIFICATIONS - 3.5k 5-1/2” Long U-bolts, U-Bolt plates for 1-3/4 Springs’, U-Bolts 2-3/8” width for Round Axles, ½-20 Hex Nuts

TRAILER AXLES – U-Bolt Kit for 3,500 lb Trailer Axles

Thread size: 1/2"

Distance between threads: 2 7/8"

Total bolt length is 8"

[Repair Your Threads]: Renew damaged or stripped threads with the ABN 261 Piece Screw Thread Repair Tool Set; Heavy duty coil repair kit rethreading kit works on steel, cast iron, aluminum alloy, and copper

[Size for Every Project]: Each thread saver automotive thread restorer kit features both metric and standard sizes including M12 x 1.75, M10 x 1.5, M8 x 1.25, M6 x 1.0, and M5 x 0.8; 1/2in-13, 7/16in-14, 5/16in-18, 3/8in-16, and 1/4in-20

[Complete Coil Master Kit]: U flute drill bits, threaded screw taps, handled thread insert tools, breaking tools and wire thread inserts are included in each size so you have the right tools for every project

Belltech Flip Kits provide dramatic lowering on the rear of your Sport Truck or SUV by relocating the rear axle of your truck from under to on top of the leaf spring

Belltech Rear flip kits are engineered for each individual application

Manufactured with high quality steel and feature a durable powder coated finish and Grade 8 hardware

【Fitment】This 3 inch U-Bolt Kit is used to mount 1 3/4 inch wide or 2 inch wide leaf springs. Works on 5200lbs-7200lbs trailer axle which has 3 inch axle beam dia.

【Easy Installation】1 Kit works on ONE trailer axle. This U-Bolt Kit is used to fix the leaf spring of your vehicle. Directly replace the rusted or broken u-bolts, easy and quick mounting. Torque to 70-80 ft/lbs during installation.

【High Quality】Grade 2. Made of heat-treated steel, sturdy, high strength and durable. U-Bolt: 1/2 inch x 3 inch x 7 1/4 inch. The threads are deep and clear, with even force and good tightening strength when used. Good rust and corrosion resistant.

【Pipe Diameter】 2.5"; Pipe Thickness: 1/16 inch / 1.58 mm ; 8pcs Universal Aluminum Piping Kit+Silicone 3Ply High Quality Hose Coupler+T-Bolt Clamp.Its surface carried on the polish and extension processing, Perfect for All Turbo DIY Intercooler Piping Project,Increases Up to 65% Air Flow Compared to Standard Bent Piping.

【Premium Quality Material】8pcs Universal 600mm 2.5" Aluminum Turbo Intercooler Piping Kit, is made of high quality T-6061 lightweight aluminum, polished surface pipes resist wear, rust and corrosion for extra high heat durability and light weight, the service life is long, so you can use it freely.

【Outstanding Design】DIY Custom Polished 2.5" Intercooler Piping U-Pipe Kit, High Polishing Treatment, Designed to be cut, spliced or welded to fit custom applications, The precise mandrel-bent aluminum tubing keeps air flow uniform, smooth and free-flowing.

Compatibility: Trailer U Bolt kit is compatible for 3500lbs round axle which axle beam diameter 2-3/8".

Package Include: 4 x 5-1/2" long U bolts (M12X1.75"), 2 x tie plates for 1-3/4" leaf springs, Metric M12 x 1.75 nuts

Structure Stability: All parts are made of high quality steel, not easy to break, deformation, rust, very durable for your need.

For 3,500lbs round axle which axle beam dia 2-3/8"

4 x 5-1/2" long U bolts, U bolts dia. 1/2", 8 x 1/2"-20 hex nuts, 2 x tie plates for 1-3/4" leaf springs

Durable steel construction. Resistant to rust and corrosion

Includes four individual u-bolts and a hardware pack

Consists of eight washers and eight nyloc nuts

Made of high quality material

Direct replacement - this body bolt matches the fit and function of the factory part on specified years, makes and models

Ideal solution - this bolt is a reliable replacement for an original part that is missing or has failed due to fatigue

Durable construction - this part is made from quality materials to ensure reliable performance and long service life

U-Bolt Size - 7" Long

Plate Size - 1-3/4"

Hex Nut & Washers - 1/2"

Compatible/Replacement For: 1999-2018 Chevy Silverado 1500 / 1999-2018 GMC Sierra 1500

Placement on Vehicle: Rear,Left,Right

Surface Finish: Steel

【PRECISION DESIGN, DIRECT FIT】: Eye to Eye length: 25-1/4 inch; Free open: 3 inch; Width of leaf: 1-3/4 inch; 5 leaves; 9/16 inch bushing dia. 3000 lb Capacity Per Spring For 6000 lbs Trailers.

【DIRECT REPLACEMENT】: Fits: SW5 / LIB-502-DE / UNA111 / PR5 / 9150018 / 93163.

【EASY INSTALLATION】: Include 5,200-7,000lbs axle U-bolt kit for 3" dia round trailer axle. Kit include: 4 x 7" long U bolts, U bolts dia- 1/2"; 2 x tie plates for 1-3/4" or 2" leaf springs; 8 x 1/2"-20 hex nuts.