Best Square U-Bolts of 2025

Corey Phillips Avatar
Corey Phillips
Last Updated: 1 Feb 2025

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Square U-bolts are a type of fastener that are commonly used in various industries such as automotive, construction, and manufacturing. They are designed to secure round objects such as pipes, cables, and tubes to flat surfaces. Square U-bolts are made of high-quality materials such as steel or stainless steel, making them durable and resistant to corrosion. They come in various sizes and finishes to accommodate different applications. Square U-bolts are ideal for stabilising and securing loads and are a reliable choice for many professionals.

At a Glance: Our Top Picks

sourcing map Square U-Bolts with Nuts and Washers Cover #TOP 1
sourcing map Square U-Bolts with Nuts and Washers
ftb score rating icon 9.8
YINETTECH 4 Sets M8 Stainless Steel U-Bolts Cover #TOP 2
YINETTECH 4 Sets M8 Stainless Steel U-Bolts
ftb score rating icon 9.7
sourcing map 304 Stainless Steel U-Bolts Set Cover #TOP 3
sourcing map 304 Stainless Steel U-Bolts Set
ftb score rating icon 9.5

Top 10 Square U-Bolts

#TOP 1

sourcing map Square U-Bolts with Nuts and Washers

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Silver
60x120mm(W*L)
sourcing map Square U-Bolts with Nuts and Washers Cover
sourcing map Square U-Bolts 2-3/8"(60mm) Inner Width Carbon Steel M8 with Nuts, Frame Plate, Round Washers

The sourcing map U-Bolts feature an M8 thread diameter and are designed to fit square rod sizes of 60mm. With a total length of 120mm, these U-bolts provide a secure fastening solution for various applications. The included hex nuts and frame plate, measuring 90 x 25mm, ensure stability and strength. Additionally, the round washers enhance the connection by distributing weight evenly, making it easier for you to attach components to pipes or wood securely.

What We Like
High corrosion resistance
Includes essential fastening components
Suitable for various applications
Durable carbon steel construction
Easy to install
#TOP 2

YINETTECH 4 Sets M8 Stainless Steel U-Bolts

Silver
YINETTECH 4 Sets M8 Stainless Steel U-Bolts Cover
YINETTECH 4 Sets M8 Square U-Bolts 304 Stainless Steel U Clamp Bolt with Nuts and Washers 42mm Inner Width for Trailers Pipes Wood Hardware

The YINETTECH M8 U-Bolts come as a complete set, including four U-shaped bolts, baffle plates, washers, and nuts, making installation straightforward. With dimensions of 56 x 100mm and an inner width of 42mm, these bolts are versatile and can fit various applications. Made from high-quality 304 stainless steel, they offer exceptional durability and corrosion resistance, ensuring a long service life. Their easy-to-use design allows you to efficiently secure items, giving you peace of mind in your projects.

What We Like
Durable stainless steel material
Complete set for easy installation
Versatile for various applications
Corrosion-resistant and long-lasting
#TOP 3

sourcing map 304 Stainless Steel U-Bolts Set

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M8x102mmx100mm
sourcing map 304 Stainless Steel U-Bolts Set Cover
sourcing map Square U-Bolts, 2 Sets 102mm(4.02") Inner Width 100mm Length M8 304 Stainless Steel U Clamp Bolt with Nuts and Plates, for Boat Trailer

The sourcing map U-Bolts are designed to provide strong and reliable connections for various applications. With an M8 thread diameter and an inner width of 102mm, these U-bolts fit rods measuring 100mm in length, ensuring a secure fit. The hex nut size of 13 x 6.2mm makes it easy for you to tighten securely. Made from 304 stainless steel, these bolts are resistant to corrosion and rust, making them ideal for use in wet environments. The package includes plates and nuts, ensuring you have everything you need for a complete installation.

What We Like
Corrosion-resistant stainless steel
Includes nuts and plates
Deep, clear threading
Versatile for various applications
Easy to install
#TOP 4

sourcing map Square U-Bolts with Nuts and Washers

a20090800ux0559
Silver
40x120mm(W*L)
sourcing map Square U-Bolts with Nuts and Washers Cover
sourcing map Square U-Bolts 1-5/8"(40mm) Inner Width 120mm Length Carbon Steel M8 with Nuts, Frame Plate, Round Washers 4 Set

The sourcing map U-Bolts are designed for a variety of fastening applications. With an M8 thread diameter, they fit square rods measuring 40mm in inner width, ensuring a secure fit. The total length of 120mm provides ample reach for various projects. Additionally, the included hex nuts and round washers facilitate a tight connection, enhancing stability and safety in your installations. Made from carbon steel, these U-bolts offer excellent resistance to rust and corrosion, ensuring durability and longevity.

What We Like
Durable carbon steel construction
Easy to install with included nuts
Versatile for multiple applications
Good resistance to rust
Secure fit for various rod sizes
#TOP 5

sourcing map 304 Stainless Steel U-Bolts Set

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M10x100x140mm
sourcing map 304 Stainless Steel U-Bolts Set Cover
sourcing map Square U-Bolts, 3 Sets 100mm(3.94") Inner Width 140mm Length M10 304 Stainless Steel U Clamp Bolt with Nuts and Plates, for Boat Trailer

The sourcing map U-Bolts are crafted from 304 stainless steel, ensuring durability and resistance to corrosion, making them ideal for wet environments. With a thread diameter of M10 and an inner width of 100mm, these U-bolts provide a secure fit for various rod sizes. The deep and clear threading prevents slipping, giving you confidence during installation. Additionally, the included plates and nuts enhance convenience, ensuring you have everything needed for a firm connection while using these bolts in applications like trailers or plumbing.

What We Like
Corrosion-resistant stainless steel
Includes nuts and plates
Deep, clear threading
Versatile applications
Secure fit for various sizes
#TOP 6

Uxcell Stainless Steel U-Bolt for Trailers

a22110800ux0745
M8x32mmx60mm
Uxcell Stainless Steel U-Bolt for Trailers Cover
sourcing map Square U-Bolts, 32mm(1.26") Inner Width 60mm Length M8 304 Stainless Steel U Clamp Bolt with Nuts and Plates, for Boat Trailer

The Uxcell U-Bolt features a thread diameter of M8, ensuring a secure fit for rods sized at 30mm, with a total length of 60mm. Made from durable 304 stainless steel, it resists corrosion and rust, making it ideal for wet environments. The included hex nuts and plates provide added convenience, ensuring that you can easily secure components without worry. With a deep and clear thread design, you can trust that the Uxcell U-Bolt will hold firmly in place, offering peace of mind during use.

What We Like
Corrosion-resistant stainless steel
Includes nuts and plates
Secure fit for various applications
Deep thread for stability
#TOP 7

sourcing map U Bolts for Construction and Plumbing

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sourcing map U Bolts for Construction and Plumbing Cover
sourcing map U Bolts 4 Sets (M8x40x100mm), Square U Bolt Carbon Steel with Accessories - for Construction, Pipe

The sourcing map U Bolts are designed for securely fixing objects to pipes or wood, making them ideal for various applications such as trailers and plumbing. With a specification fit for square objects of 40mm, these bolts ensure a robust connection thanks to their carbon steel construction, which offers impressive anti-rust and corrosion resistance. The U-shaped design, featuring threads at both ends, allows for easy connection with nuts and washers, providing you with a reliable fastening solution for your projects.

What We Like
Durable carbon steel construction
Includes necessary accessories
Resistant to rust and corrosion
Versatile for multiple applications
Easy to install
#TOP 8

4 Steel Square U-Bolts with Nuts

CSS
Silver
4 Steel Square U-Bolts with Nuts Cover
4 x Steel Square U-bolt U bolts Boat Trailer 60x60x10mm M10 Nuts Plate UB4

The CSS U-Bolts are high-quality steel square bolts designed for various applications. With a size of 60x60x10mm and complete with M10 threaded locking nuts, they provide secure fastening for different fixtures. You can use these bolts for frame fixtures, ensuring a stable structure. They are also ideal for cable to wall connectors or clamps, making installations easier. Additionally, they support pipework and conduit holders, enhancing your plumbing or electrical projects. Overall, these U-Bolts offer versatility and reliability for your needs.

What We Like
High-quality steel construction
Versatile applications
Includes locking nuts
Easy installation
#TOP 9

PATIKIL M6 Square U-Bolts Kit with Plates

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Silver Tone
M6*25*50mm
PATIKIL M6 Square U-Bolts Kit with Plates Cover
PATIKIL M6x25x50mm Square U-Bolts Kit, 4Set 304 Stainless Steel Square U Shaped Bolts Replacement Parts with Frame Plates and Nuts for Ski Board Sailboat Trailer

The PATIKIL U-Bolts Kit is crafted from 304 stainless steel, ensuring excellent resistance to rust and corrosion. With a thread diameter of M6 and an inner width of 26mm, these bolts provide a strong and stable connection, making them ideal for securing various objects. You will appreciate their durability, as they can withstand heavy loads without compromising on strength. The kit includes four square U-bolts, four plates, and eight nuts, making it convenient for your installation needs.

What We Like
Durable stainless steel construction
Excellent corrosion resistance
Strong and stable connections
Includes essential installation parts
#TOP 10

Fadbudss 4 Pack Stainless Steel U-Bolts

Fadbudss
Fadbudss 4 Pack Stainless Steel U-Bolts Cover
4 Pack M6 Square U-Bolts, 80 x 50 mm Stainless Steel U Clamp Bolt Fastener with Nuts and Frame Plates, U Bolts Brackets for Industrial Hardware Pipe Conduit Cable Tube Marine Boat Deck Trailer Auto

The Fadbudss U-Bolts feature heavy-duty construction from high-quality stainless steel, ensuring excellent rust resistance and durability for various applications. Their versatile U-bracket design provides maximum stability, making them perfect for securing pipes and mounting vehicles. Each pack includes all components needed for installation, simplifying the process for you. With precision design, these bolts fit perfectly into pre-drilled holes, offering a secure hold and reducing the risk of loosening over time.

What We Like
Durable stainless steel material
Versatile for multiple applications
Easy and straightforward installation
Includes nuts and plates
Buying Guide Image
Editor's Notes

During our square u-bolt research, we found 306 square u-bolt products and shortlisted 10 quality products. We collected and analyzed 4,782 customer reviews through our big data system to write the square u-bolts list. We found that most customers choose square u-bolts with an average price of £7.94.

The square u-bolts are available for purchase. We have researched hundreds of brands and picked the top brands of square u-bolts, including sourcing map, YINETTECH, Uxcell, CSS, PATIKIL. The seller of top 1 product has received honest feedback from 20,002 consumers with an average rating of 4.8.

Written by
Corey Phillips Avatar

Corey Philips is an electrician and lighting expert. He graduated from the University of Birmingham in 2012 with a Bachelor's degree in electrical and electronics engineering. Corey is a specialist contractor in lights. He sells and installs and recommends lights and lamp sheds, and other lights accessories. Aside from that, Corey is vast in installing and maintaining electrical appliances like air conditioners, water heaters, and the likes.