Top 10 U Bolts Leaf Spring – Automotive Replacement Leaf Spring Leaf Springs

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1. Freedom Offroad

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Freedom OffRoad 4 pcs Square U Bolts for 2.5” Wide Leaf Springs 8 5/8” Long

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Freedom Offroad #ad - Black powder coated finish. Lifetime warranty. 8 5/8” long measured from the bottom of the threads to the bottom of the bend. Designed to work with 2. 5” wide leaf springs, includes washers and lock nuts.
BrandFreedom Offroad #ad
ManufacturerFreedom OffRoad #ad
Height6 Inches
Length10 Inches
Weight100 Kilograms
Width1 Inches
Part NumberFO-G404

2. Speedway Motors

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Set of 4, Leaf Spring U-Bolt for 3 Inch Axle Tube, 8 Inch Long

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Speedway Motors #ad - 8" overall length, 6" thread length and 1/2"-20 thread pitch. Great replacement for worn out stock bolts and feature a generous length to accommodate lowering blocks. Includes nylock nuts for easy installation. Zinc-plated for rust and corrosion prevention. Premium heavy-duty steel construction for consistent performance and reliability.
BrandSpeedway Motors #ad
ManufacturerSpeedway Motors #ad
Height0 Inches
Length8 Inches
Weight4 Pounds
Width0 Inches
Part Number9107911

3. American Automotive

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American Automotive Silverado Sierra 1500HD 2500HD 3500HD Lift Kit 2" Rear Suspension Lift Steel Blocks + Extra Long 12" Square Leaf Spring Axle U Bolts

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American Automotive #ad - Made for maximum u bolt clamp force with an even distribution of pressure, American axle u bolts eliminate flexing and provide the strength to maintain original vehicle handling.

American blocks absorb noise and vibrations, and are tapered for perfect pinion alignment. Contents: 2 us certified tapered steel lift blocks with 4 OEM grade steel square bend u-bolts, hi-nuts and extra thick washers. Benefits: american automotive steel lift blocks are stronger than aluminum. Fitment: 2001 - 2010 silverado sierra 1500hd 2500hd 3500hd 8-lug 4wd/2wd; 2. 5" axles only and doES NOT fit models with spring overloads. Technical notes: install the tallest ends of tapered rear blocks to the rear of the vehicle; Retighten u-bolts after the first 500 miles. They are designed to increase rear load and towing capacity.
BrandAmerican Automotive #ad
ManufacturerAmerican Automotive #ad
Weight15 Pounds
Part NumberUBRBST10-501

4. RockTrix

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3.15 inch Width, F-250 F-350, Black, Leaf Spring Axle Extended U-Bolts Square Bend Compatible with Ford 1999-2004 F250 F350 Super Duty Excursion 4WD 4x4-12 inch Length

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RockTrix #ad - Ubolt length: 12 inches. Designed to be solid so that it does not bend or warp under stress, and as long as they are properly installed should last the lifetime of your vehicle. Ubolt inside Width: 3. 15 inches. Make sure nuts are tightened evenly refer to diagram for sequence and that they are torqued to correct manufacturer specifications.

All parts including the Nuts and Washers are hardware grade 109. The use of loctite is recommended to protect the threads from rust / corrosion and prevent loosening from vibrations. Only fits four-wheel drive 4WD models. May fit other vehicles. These extended u bolts ensure proper thread engagement when securing your lift pack and leaf springs to your vehicle. Verify length and width needed, 1999-2005 F-350 F350 Super Duty, as well as the bend shape.

Installation these square ubolts do not come with instructions but is completely bolt-on. Fitment compatible with ford 1999-2004 f-250 f250 super duty, 2000-2005 excursion. Material & manufacturing the u-bolts are made from heat treated carbon steel for optimal durability and fitment. Specifications includes 4 square bend u-bolts, 8 nuts, 8 washers. Should take 1-2 hours to install.
BrandRockTrix #ad
ManufacturerRockTrix #ad
Height6 Inches
Length12 Inches
Weight7.26 Pounds
Width12 Inches
Part NumberUBolt-FD-F250/F350-BK

5. American Automotive

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American Automotive Ram 2500 3500 4WD 1-2 Rear Suspension Lift U Bolts 4 PCS 15.75" Extra Long OEM Material

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American Automotive #ad - Specifications: square bend 15. 75 inch length, 3. 25 inch width, 5/8 inch thread Pitch with 6 Inch thread can be cut down. Contents: 4 certified carbon steel square leaf spring axle u-bolts with grade 8 hi-nuts and security spring washers.

Fitment: 1994-2002 ram 2500 3500 4wd; does Not Fit Overload Models. Please verify size before purchasing. Benefits: american u-bolts are designed for maximum u bolt clamp and embody extreme strength; These u bolts provide an even distribution of pressure to protect against premature spring failure and unwanted movement; Made of OEM factory material American u bolts maintain original vehicle handling characteristics and are guaranteed for life.
BrandAmerican Automotive #ad
ManufacturerAmerican Automotive #ad
Part NumberUBLT15-002

6. American Automotive

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American Automotive Square U Bolts 10" Extra Long Certified OEM Material Set of 4 Made in USA

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American Automotive #ad - Technical notes: retighten u-bolts after the first 500 miles; Minor settling from new or repaired springs can cause a reduction in clamp force. Contents: 4 certified carbon steel square leaf spring axle u-bolts with grade 8 hi-nuts and security spring washers. Benefits: american leaf spring axle u-bolts are designed for maximum u bolt clamp and embody extreme strength; These ubolts provide an even distribution of pressure to protect against premature spring failure and unwanted movement.
BrandAmerican Automotive #ad
ManufacturerAmerican Automotive #ad
Height1 Inches
Length10 Inches
Weight7.2 Pounds
Width2.5 Inches
Part NumberUBLT12-388
ModelUBLT12-388

7. American Automotive

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American Automotive Tacoma 6-lug 1" Rear Suspension Lift U Bolts 4PCS 8.5" Long OEM Factory Material

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American Automotive #ad - Technical notes: retighten u-bolts after the first 500 miles; Minor settling from new or repaired springs can cause a reduction in clamp force. Contents: 4 certified carbon steel square leaf spring axle u-bolts with 4" thread can be cut down to fit other applications and grade 8 hi-nuts and security spring washers.

Benefits: american leaf spring axle u-bolts are designed for maximum u bolt clamp and embody extreme strength; These ubolts provide an even distribution of pressure to protect against premature spring failure and unwanted movement; Made of OEM factory material American u bolts maintain original vehicle handling characteristics and are guaranteed for life. Fitment: square bend to clamp 2. 5" wide leaf springs on 1995-2021 tacoma 6-lug 4WD/2WD; Specs are 8 Inch Length, 2. 5 inch width, 9/16 Inch Thread Pitch.
BrandAmerican Automotive #ad
ManufacturerAmerican Automotive #ad
Height1 Inches
Length8.5 Inches
Weight6.3 Pounds
Width2.5 Inches
Part NumberUBLT11-794
ModelUBLT11-794
WarrantyLifetime Warranty

8. OTUAYAUTO

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AUTOPTIM 3 inch Rear Leveling Lift Block Kit, Replacement for 2004-2021 Ford F150 Square Leaf Spring Axle U Bolts Set

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OTUAYAUTO #ad - Designe for modification - strut spacer kit can provide unmatched ground clearance to conquer on and off-Road obstacles and allowing to fit larger custom rims and tires. Leveling kit benefits - lift blocks kit absorb noise and vibrations, and are tapered for perfect pinion alignment.

Maintains your original ride quality, steering quality and driving comfort. 2 years warranty and feel free contact us with any problem, reply in 24 hours. Brand guarantee - an alignment is recommended after install. Will raise your truck 2" in the rear. Compatibility with - leveling lift block kit replacement for 2004-2021 f150109 grade premium bolts, excellent resistance to corrosion by black anodized surface process. Does not fit 5-Lug Tacoma models.

Safe driving - forged aircraft billet aluminum t6 treated. Contents: 2 x 2'' rear blocks & 4 U bolts. Made for maximum u bolt clamp force with an even distribution of pressure, axle u bolts eliminate flexing and provide the strength to maintain original vehicle handling. Install the tallest ends of tapered rear blocks to the rear of the vehicle; Retighten u-bolts after the first 500 miles. Lift block kit installed in about 1 1/2-2 hours.
BrandOTUAYAUTO #ad
Part NumberQPUSQHB012

9. Sturdy Built

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6 1/4" Long, Sturdy Built Single Axle Galvanized U Bolt Kit for mounting Boat Trailer Leaf Springs for 2x3 axle

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Sturdy Built #ad - Enough u bolts and plates to mount a Single Axle to Your Trailer. All hot-dipped galvanized parts, perfect for Fresh Water or Saltwater Boat Trailers, or Utility/Land Trailers in Icy or Coastal locations. Square u bolt size: 1/2 inch diameter x 2 inch Inside Width x 6 1/4 inch Inside Length. The included u bolts and plates are designed to fit around a 2 inch by 3 inch Square Boat Trailer Axle. Complete single axle kit: includes all of the Galvanized Hardware and Parts Pictured. Fits a 2x3 square axle.
BrandSturdy Built #ad
ManufacturerSturdy Built #ad
Part Number24405-K

10. RockTrix

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2.6" Inside Width Compatible with 2007-2017 Chevy Silverado 1500, RockTrix, Leaf Spring Axle Extended U-Bolts 11" Length, GMC Sierra, GMC Sierra 1500 2WD and 4WD, Pack of 4, Leveling Kit

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RockTrix #ad - All parts including the Nuts and Washers are hardware grade 109. All parts are Hardware Grade 109. May fit other vehicles. Zinc plating / coating prevents surface corrosion and rust. Fitment compatible with 2007-2017 chevrolet silverado 1500 Compatible with 2007-2017 gmc sierra 1500 Please consult a professional if you need support.

Make sure nuts are tightened evenly refer to diagram for sequence and that they are torqued to correct manufacturer specifications. Should take 1-2 hours to install. Specifications includes 4 square bend u-bolts, 8 nuts, 8 washers. These extended u bolts ensure proper thread engagement when securing your lift pack and leaf springs to your vehicle. Ubolt inside Width: 2. 6 inches. Installation these square ubolts do not come with instructions but is completely bolt-on.

Product benefits for use with 1 to 3 inch lift blocks / plates. The use of loctite is recommended to protect the threads from rust / corrosion and prevent loosening from vibrations. Fits both four-wheel drive 4WD and two-wheel drive 2WD RWD models. Designed to be solid so that it does not bend or warp under stress, and as long as they are properly installed should last the lifetime of your vehicle.
BrandRockTrix #ad
ManufacturerRockTrix #ad
Height6 Inches
Length12 Inches
Weight6.65 Pounds
Width12 Inches
Part NumberUBolt-CT/GMC-148