20 Best Spring U Bolts [2024]

Are you looking for the best Spring U Bolts? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling Spring U Bolts.

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1 Freedom OffRoad 4 pcs Square U Bolts for 2.5” Wide Leaf Springs 8 5/8” Long Freedom OffRoad 4 pcs Square U Bolts for 2.5” Wide Leaf Springs 8 5/8” Long
2 Sturdy Built Single Axle Galvanized U Bolt Kit for mounting Boat Trailer Leaf Springs for 2x2 axle -... Sturdy Built Single Axle Galvanized U Bolt Kit for mounting Boat Trailer Leaf Springs for 2x2 axle...
3 ReadyLift 67-2195UB U-Bolt Kit (390 mm Ford Super Duty F250/F350 4WD 1999-2010) ReadyLift 67-2195UB U-Bolt Kit (390 mm Ford Super Duty F250/F350 4WD 1999-2010)
4 Trailer Axle 2 3/8' Round U-Bolt Kit Trailer Axle 2 3/8" Round U-Bolt Kit
5 American Automotive Ram 2500 3500 4WD 1-2 Rear Suspension Lift U Bolts 4 PCS 15.75' Extra Long OEM... American Automotive Ram 2500 3500 4WD 1-2 Rear Suspension Lift U Bolts 4 PCS 15.75" Extra Long...
6 Leaf Spring Axle Extended U-Bolts (Square Bend) Compatible with Ford 1999-2004 F250 F350 Super Duty... Leaf Spring Axle Extended U-Bolts (Square Bend) Compatible with Ford 1999-2004 F250 F350 Super...
7 Leaf Spring U-Bolt for 3 Inch Axle Tube, 8 Inch Long, Set of 4 Leaf Spring U-Bolt for 3 Inch Axle Tube, 8 Inch Long, Set of 4
8 Sturdy Built Single Axle Galvanized U Bolt Kit for mounting Boat Trailer Leaf Springs for 2x2 axle -... Sturdy Built Single Axle Galvanized U Bolt Kit for mounting Boat Trailer Leaf Springs for 2x2 axle...
9 Rubicon Express RE2420 Dana 30 U-Bolt Kit for Jeep YJ Rubicon Express RE2420 Dana 30 U-Bolt Kit for Jeep YJ
10 Freedom OffRoad 4 pcs Square U Bolts for 2.5” Wide Leaf Springs 12” Long Freedom OffRoad 4 pcs Square U Bolts for 2.5” Wide Leaf Springs 12” Long
11 American Automotive Square U Bolts 10' Extra Long Certified OEM Material Set of 4 Made in USA American Automotive Square U Bolts 10" Extra Long Certified OEM Material Set of 4 Made in USA
12 Trailer Axle 1 3/4' Round U-Bolt Kit Trailer Axle 1 3/4" Round U-Bolt Kit
13 Dorman Help! 35635 Spring U Bolt Dorman Help! 35635 Spring U Bolt
14 Tie Down Engineering 81185 Square Marine Axle Tie Plate Kit Tie Down Engineering 81185 Square Marine Axle Tie Plate Kit
15 American Automotive 2002-2008 RAM 1500 2WD/ 4WD 1-2' Rear Lift U Bolts 10' Extra Long OEM Material American Automotive 2002-2008 RAM 1500 2WD/ 4WD 1-2" Rear Lift U Bolts 10" Extra Long OEM Material
16 American Automotive Compatible with Ram 1500 2500 3500 2WD 14 Inch Square Leaf Spring Axle U Bolts... American Automotive Compatible with Ram 1500 2500 3500 2WD 14 Inch Square Leaf Spring Axle U...
17 Fits a Cherokee XJ Rear Suspension Lift U Bolts 4PCS 6.5' 8.25 Axle 3' Inch Wide OEM Material Fits a Cherokee XJ Rear Suspension Lift U Bolts 4PCS 6.5" 8.25 Axle 3" Inch Wide OEM Material
18 osemar U Bolts for Boat Trailer Axle Leaf Springs Galvanized, 2 1/8' W x 4 3/4' L osemar U Bolts for Boat Trailer Axle Leaf Springs Galvanized, 2 1/8" W x 4 3/4" L
19 American Automotive Silverado Sierra 1500HD 2500HD 3500HD 1-2' Lift U Bolts 4PCS 12.5' Extra Long American Automotive Silverado Sierra 1500HD 2500HD 3500HD 1-2" Lift U Bolts 4PCS 12.5" Extra Long
20 RockTrix - Pack of 4 - Leaf Spring Axle Extended U-Bolts (11' Length, 2.6' Inside Width) Compatible... RockTrix - Pack of 4 - Leaf Spring Axle Extended U-Bolts (11" Length, 2.6" Inside Width)...
SaleBestseller No. 1
Freedom OffRoad 4 pcs Square U Bolts for 2.5” Wide Leaf Springs 8 5/8” Long
  • - Designed to work with 2.5” wide leaf springs, includes washers and lock nuts
  • - 8 5/8” long measured from the bottom of the threads to the bottom of the bend
  • - Black powder coated finish
  • - Lifetime warranty
Bestseller No. 2
Sturdy Built Single Axle Galvanized U Bolt Kit for mounting Boat Trailer Leaf Springs for 2x2 axle -...
  • All Hot-Dipped Galvanized Parts, Perfect for Fresh Water or Saltwater Boat Trailers, or Utility/Land Trailers in Icy or Coastal locations.
  • Complete Single Axle Kit: Includes All of the Galvanized Hardware and Parts Pictured. Enough U Bolts and Plates to mount a Single Axle to Your...
  • Fits a 2x2 Square Axle. The included U Bolts and Plates are designed to fit around a 2 inch by 2 inch Square Boat Trailer Axle.
  • Square U Bolt Size: 1/2 inch Diameter x 2 inch Inside Width x 5 1/4 inch Inside Length
Bestseller No. 3
ReadyLift 67-2195UB U-Bolt Kit (390 mm Ford Super Duty F250/F350 4WD 1999-2010)
  • M16 Round 390mm Long U-Bolt Kit
  • Contains 4 U-bolts
  • Includes 8 nuts
  • Complete kit
  • Made in USA
Bestseller No. 4
Trailer Axle 2 3/8" Round U-Bolt Kit
  • For 2 3/8" round axle, bolt length 5 1/2", 1/2" diameter, for 1 3/4" spring
  • 1 kit does an entire axle
  • SAE 1018 Hot Rolled
Bestseller No. 5
American Automotive Ram 2500 3500 4WD 1-2 Rear Suspension Lift U Bolts 4 PCS 15.75" Extra Long OEM...
  • FITMENT: 1994-2002 Ram 2500 3500 4WD; Does Not Fit Overload Models
  • SPECIFICATIONS: Square Bend 15.75 Inch Length, 3.25 Inch Width, 5/8 Inch Thread Pitch with 6 Inch thread can be cut down. Please verify size before...
  • CONTENTS: 4 certified carbon steel square leaf spring axle u-bolts with grade 8 hi-nuts and security spring washers.
  • BENEFITS: American u-bolts are designed for maximum u bolt clamp and embody extreme strength; These u bolts provide an even distribution of pressure...
Bestseller No. 6
Leaf Spring Axle Extended U-Bolts (Square Bend) Compatible with Ford 1999-2004 F250 F350 Super Duty...
  • [FITMENT] Compatible with Ford 1999-2004 F-250 F250 Super Duty, 1999-2005 F-350 F350 Super Duty, 2000-2005 Excursion. Only Fits four-wheel drive 4WD...
  • [SPECIFICATIONS] Includes (4) Square Bend U-Bolts, (8) Nuts, (8) Washers. All parts are Hardware Grade 10.9. Ubolt Length: 12 inches. Ubolt Inside...
  • [PRODUCT BENEFITS] For use with 1 to 3 inch lift blocks / plates. These extended U Bolts ensure proper thread engagement when securing your lift pack...
  • [MATERIAL & MANUFACTURING] The U-Bolts are made from Heat Treated Carbon Steel for optimal durability and fitment. All parts (including the Nuts and...
  • [INSTALLATION] These square ubolts do not come with instructions but is completely bolt-on. Please consult a professional if you need support. Should...
Bestseller No. 7
Leaf Spring U-Bolt for 3 Inch Axle Tube, 8 Inch Long, Set of 4
  • Great replacement for worn out stock bolts and feature a generous length to accommodate lowering blocks
  • Premium heavy-duty steel construction for consistent performance and reliability
  • 8" overall length, 6" thread length and 1/2"-20 thread pitch
  • Zinc-plated for rust and corrosion prevention
  • Includes nylock nuts for easy installation
Bestseller No. 8
Sturdy Built Single Axle Galvanized U Bolt Kit for mounting Boat Trailer Leaf Springs for 2x2 axle -...
  • All Hot-Dipped Galvanized Parts, Perfect for Fresh Water or Saltwater Boat Trailers, or Utility/Land Trailers in Icy or Coastal locations.
  • Complete Single Axle Kit: Includes All of the Galvanized Hardware and Parts Pictured. Enough U Bolts and Plates to mount a Single Axle to Your...
  • Fits a 2x2 Square Axle. The included U Bolts and Plates are designed to fit around a 2 inch by 2 inch Square Boat Trailer Axle.
  • Square U Bolt Size: 1/2 inch Diameter x 2 inch Inside Width x 4 13/16 inch Inside Length
Bestseller No. 9
Rubicon Express RE2420 Dana 30 U-Bolt Kit for Jeep YJ
  • Rubicon Express RE2420 U-Bolt; For Use On Dana 30 Axle Housing;
  • Country of Origin: UNITED STATES
  • Package Weight: 1.755 kilograms
  • Package Dimension : 23.114 cms L x 15.748 cms W x 6.858 cms H
SaleBestseller No. 10
Freedom OffRoad 4 pcs Square U Bolts for 2.5” Wide Leaf Springs 12” Long
  • - Designed to work with 2.5” wide leaf springs, includes washers and lock nuts
  • - 12” long measured from the bottom of the threads to the bottom of the bend
  • - Black powder coated finish
  • - Lifetime warranty
Bestseller No. 11
American Automotive Square U Bolts 10" Extra Long Certified OEM Material Set of 4 Made in USA
  • CONTENTS: 4 certified carbon steel square leaf spring axle u-bolts with grade 8 hi-nuts and security spring washers.
  • TECHNICAL NOTES: Retighten u-bolts after the first 500 miles; Minor settling from new or repaired springs can cause a reduction in clamp force
  • BENEFITS: American leaf spring axle u-bolts are designed for maximum u bolt clamp and embody extreme strength; These ubolts provide an even...
Bestseller No. 12
Trailer Axle 1 3/4" Round U-Bolt Kit
  • For 1 3/4" round axle, bolt length 4", 3/8" diameter.
  • 1 kit does an entire axle
Bestseller No. 13
Dorman Help! 35635 Spring U Bolt
  • The dimensions of the bolt are 9/16 X 8 - 1/8 X 2-5/8 Square
Bestseller No. 14
Tie Down Engineering 81185 Square Marine Axle Tie Plate Kit
  • Product Type: Cargo Strap
  • Package Quantity: 1
  • Package Dimensions: 5.08 cms (L) x 21.082 cms (W) x 26.924 cms (H)
  • Country of Origin: United States
Bestseller No. 15
American Automotive 2002-2008 RAM 1500 2WD/ 4WD 1-2" Rear Lift U Bolts 10" Extra Long OEM Material
  • FITMENT: 2002-2008 RAM 1500 2WD/ 4WD; Fits All Models with 3.5" Axle Only / Does Not Fit Mega Cab Models
  • SPECIFICATIONS: 10 Inch Length, 3.5 Inch Width, 4 Inch Thread Length, 9/16 Inch Thread Pitch
  • CONTENTS: 4 certified carbon steel round leaf spring axle u-bolts with grade 8 hi-nuts, security spring washers and Installation Instructions
  • TECHNICAL NOTES: Retighten u-bolts after the first 500 miles; Minor settling from new or repaired springs can cause a reduction in clamp force
  • BENEFITS: American leaf spring axle u-bolts are designed for maximum u bolt clamp and embody extreme strength; These ubolts provide an even...
Bestseller No. 16
American Automotive Compatible with Ram 1500 2500 3500 2WD 14 Inch Square Leaf Spring Axle U Bolts...
  • FITMENT: 1994 - 2002 Dodge Ram 1500 2500 3500 2WD
  • KIT CONTENTS: 4x certified steel square leaf spring axle U-bolts with grade 8 nuts and extra thick washers, clear zinc plated rust protection and...
  • TECHNICAL NOTES: Retighten U-bolts after the first 500 miles, minor settling from new or repaired springs can cause a reduction in clamp force
  • BENEFITS: American leaf spring axle U-bolts are designed for maximum u bolt clamp and embody extreme strength
Bestseller No. 17
Fits a Cherokee XJ Rear Suspension Lift U Bolts 4PCS 6.5" 8.25 Axle 3" Inch Wide OEM Material
  • FITMENT: Round bend to clamp 3 wide leaf springs on 1984 - 2001 Cherokee XJ w/ Chrysler 8.25 Rear Axles
  • CONTENTS: 4 certified carbon steel round leaf spring axle u-bolts with grade 8 hi-nuts and security spring washers.
  • TECHNICAL NOTES: Retighten u-bolts after the first 500 miles; Minor settling from new or repaired springs can cause a reduction in clamp force
  • BENEFITS: American leaf spring axle u-bolts are designed for maximum u bolt clamp and embody extreme strength; These u bolts provide an even...
Bestseller No. 18
osemar U Bolts for Boat Trailer Axle Leaf Springs Galvanized, 2 1/8" W x 4 3/4" L
  • Boat Trailer U-Bolt 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 galvanized, which is more suitable for marine trailers and motor boats in salt water or fresh water.
  • Fits a 2x2 Square Axle. this Product to fit around a 2 inch by 2 inch Square Boat Trailer Axle.
  • The racks fully adjustable, according to your needs
  • Package Include: 2 galvanized flat mounting plates,2 u bolt and All hardwares in picture.
Bestseller No. 19
American Automotive Silverado Sierra 1500HD 2500HD 3500HD 1-2" Lift U Bolts 4PCS 12.5" Extra Long
  • FITMENT: 2001 - 2010 Silverado Sierra 1500HD 2500HD 3500HD 8-LUG 4WD/2WD; 2.5" Axles only and DOES NOT fit models with spring overloads
  • CONTENTS: 4 certified carbon steel square leaf spring axle u-bolts. Specs are 12 Inch Length, 2.5 Inch Width, 9/16 Inch Thread Pitch with 5" thread...
  • TECHNICAL NOTES: Retighten u-bolts after the first 500 miles; Minor settling from new or repaired springs can cause a reduction in clamp force
  • BENEFITS: American leaf spring axle u-bolts are designed for maximum u bolt clamp and embody extreme strength; These ubolts provide an even...
Bestseller No. 20
RockTrix - Pack of 4 - Leaf Spring Axle Extended U-Bolts (11" Length, 2.6" Inside Width) Compatible...
  • [FITMENT] Compatible with 2007-2017 Chevrolet Silverado 1500. Compatible with 2007-2017 GMC Sierra 1500. Fits both four-wheel drive 4WD and two-wheel...
  • [SPECIFICATIONS] Includes (4) Square Bend U-Bolts, (8) Nuts, (8) Washers. All parts are Hardware Grade 10.9. Ubolt Length: 11 inches. Ubolt Inside...
  • [PRODUCT BENEFITS] For use with 1 to 3 inch lift blocks / plates. These extended U Bolts ensure proper thread engagement when securing your lift pack...
  • [MATERIAL & MANUFACTURING] The U-Bolts are made from Heat Treated Carbon Steel for optimal durability and fitment. All parts (including the Nuts and...
  • [INSTALLATION] These square ubolts do not come with instructions but is completely bolt-on. Please consult a professional if you need support. Should...

Having trouble finding a great Spring U Bolts?

This problem is well understood by us because we have gone through the entire Spring U Bolts research process ourselves, which is why we have put together a comprehensive list of the best Spring U Boltss available in the market today.

After hours of searching and using all the models on the market, we have found the best Spring U Bolts for 2023. See our ranking below!

How Do You Buy The Best Spring U Bolts?

Do you get stressed out thinking about shopping for a great Spring U Bolts? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching Spring U Bolts, which is why we have assembled a comprehensive list of the greatest Spring U Bolts available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for Spring U Bolts that you consider buying. Your questions might include the following:

  • Is it worth buying an Spring U Bolts?
  • What benefits are there with buying an Spring U Bolts?
  • What factors deserve consideration when shopping for an effective Spring U Bolts?
  • Why is it crucial to invest in any Spring U Bolts, much less the best one?
  • Which Spring U Bolts are good in the current market?
  • Where can you find information like this about Spring U Bolts?

We’re convinced that you likely have far more questions than just these regarding Spring U Bolts, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for Spring U Bolts, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible Spring U Bolts. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an Spring U Bolts buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available Spring U Bolts currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of Spring U Bolts has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an Spring U Bolts?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your Spring U Bolts.
  5. Customer Ratings: Number ratings grade Spring U Bolts objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Spring U Bolts.
  7. Product Quality: You don’t always get what you pay for with an Spring U Bolts, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an Spring U Bolts is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining Spring U Bolts information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding Spring U Bolts is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

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FAQ:

Q: Do you need a U bolt for a leaf spring?

A: If your leaf spring is positioned above your vehicle’s axle, you will need a square leaf spring U-bolt. The square leaf spring U-bolt wraps around the leaves and attaches to the axle using a plate. If you notice increased shakiness or noise beneath your vehicle, check your leaf spring and leaf spring U-bolt.

Q: What grades do leaf spring U-bolts come in?

A: Leaf Spring U-Bolts Are Available From Grade 5 To Grade 8. We Supply All Bends: Round, Square, Semi-Round. U-Bolts Are Sold (2) Per Kit With Deep Nuts And Thick Washers. From When U-Bolt Was Originally Torqued.

Q: What types of U-bolts are available for suspension?

A: Suspension U bolts for all applications. Round U-bolts, Square U-bolts, and semi-round u bolts can be made and shipped out the same day. Many U-bolts are in stock and ready to ship. Items (0) My Account / Hi Guest 0Items Home About Us Contact Us Products My Account Category Air Springs Air Ride Suspensions Semi Truck Bumpers Cab Mate Suspensions

Q: What is the purpose of clamping the spring by the U-bolts?

A: Proper clamping of the spring by the truck u-bolts provides the desired spring stiffness and contributes to maintaining the vehicle ride height and handling characteristics as originally specified for the vehicle. How to measure a Leaf Spring U-bolts