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Best U-Bolts

U-bolts are ubiquitous, versatile tools that are both underrated and indispensable. They are used in a variety of applications, from securing pipes and cables, to car suspension components, to marine rigging, and much more. In this review, we will cover the best U-bolts of 2023, focusing on their construction, durability, ease of installation, and overall value.

What are U-Bolts

U-bolts get their name from their distinctive 'U' shape. They consist of a curved body with two threaded arms, designed for accommodating a securing component like a nut or plate.

Uses of U-bolts

U-bolts are employed in a variety of places, including:

  • Securing pipes and conduits to structures
  • Mounting engines in vehicles
  • Fastening leaf springs in vehicles
  • Holding heavy machinery in place

Key Buying Considerations

Material and Coating

U-bolts are made from various materials, each suited for different conditions:

  • Steel: Most commonly used due to its strength and durability.
  • Stainless Steel: Chosen for its rust resistance and aesthetic appeal.
  • Galvanized Steel: Steel coated with zinc, offering additional corrosion resistance.

Choose a material based on your project's requirements. For instance, if your U-bolt is likely to be exposed to moisture, consider stainless steel or galvanized steel.


Size is a critical factor in choosing U-bolts. Too small, and it won't fit; too large, and it won't provide a secure fit. The size of a U-bolt is typically defined by three measurements:

  • Diameter: The thickness of the U-bolt.
  • Inside Width: The gap between the two arms.
  • Inside Length: The distance from the base of the U to the tips of the threaded arms.

Ensure to measure the object you're securing to find the correct U-bolt size.

Thread Size

The thread size refers to the number of threads per inch on the U-bolt's arms. A higher thread count usually means a finer thread, leading to a tighter, secure fit. However, it also means the bolt is more prone to stripping. Choose a thread size based on your need for security versus durability.

U-Bolt Shape

While most U-bolts are shaped like a 'U', there are variations:

  • Round U-bolts: The most common, used for securing round objects like pipes.
  • Square U-bolts: Preferred for securing square objects or for mounting onto flat surfaces.
  • Semi-Round U-bolts: Hybrid of the two, providing some flexibility.

Where to Buy U-Bolts?

U-bolts are available in most hardware stores, both physical and online. Big-box stores often carry a wide selection, while specialized hardware stores can offer more unique options. Online retailers like Amazon provide easy access to a vast range, including customer reviews.

Tips for Buying U-bolts

  • Buy Extra: U-bolts are inexpensive. It's better to buy a few extras than to find yourself short in the middle of a project.
  • Consider Kits: Some U-bolts come with accompanying nuts and plates, saving you the effort of finding matching components.
  • Check Reviews: If buying online, check reviews. They can provide insight into the quality of the product.

Top 5 Best U-Bolts of 2023:

1. Steel City U-Bolts

Steel City U-Bolts

Steel City is making a name for itself as an innovative manufacturer of high-quality hardware, and its range of U-bolts is no exception. Constructed from high-grade steel with an anti-rust, anti-corrosion galvanized finish, these U-bolts are built to last.

The Steel City U-bolts come in a variety of sizes, making them suitable for a range of applications. They feature rolled threads for improved strength and smoother installation. Users have praised their durability and versatility, as well as the included hardware—nuts, washers, and plates. While they come at a higher price point than some competitors, the quality and robustness of these U-bolts make them a solid investment.

2. Hillman Group U-Bolts

Hillman Group U-Bolts

Hillman Group is a well-known name in the hardware industry, and its U-bolts are a testament to its reputation. These U-bolts are made from hardened steel and coated with a zinc finish for added durability.

The Hillman U-bolts are known for their excellent weight capacity and resistance to bending and breaking. They're also praised for their affordability, making them a great option for those on a budget. One downside is that they come with fewer size options than the Steel City U-bolts, but they are nonetheless a reliable and cost-effective choice.

3. National Hardware U-Bolts

National Hardware U-Bolts

National Hardware stands out for its superior manufacturing processes and attention to detail. Their U-bolts are made from stainless steel and offer an impressive balance of strength and corrosion resistance.

Customers laud the National Hardware U-bolts for their easy installation and the inclusion of all necessary hardware. The company also offers a variety of sizes, making these U-bolts suitable for numerous applications. They are a bit more expensive than the Hillman U-bolts, but their quality and durability justify the cost.

4. Everflow Supplies U-Bolts

Everflow Supplies U-Bolts

Everflow Supplies is making waves in the hardware world with its high-quality, affordable U-bolts. These U-bolts are made from durable carbon steel and feature a black oxide finish to prevent rust and corrosion.

Everflow Supplies offers a comprehensive range of sizes, satisfying the needs of various applications. Their U-bolts are praised for their strength and affordability, but some users have noted that the included nuts and washers are not of the same high quality as the U-bolt itself.

5. Heavy Duty U-Bolts by Bolt Dropper

Heavy Duty U-Bolts by Bolt Dropper

Bolt Dropper's Heavy Duty U-bolts are designed for applications that require extra strength and durability. Made from marine-grade stainless steel, these U-bolts offer unparalleled corrosion resistance, making them ideal for use in harsh environments.

While these U-bolts come at a higher price point, users rave about their strength and durability. The company offers fewer size options than others on this list, but for those who need heavy-duty hardware, Bolt Dropper's U-bolts are worth considering.


Choosing the right U-bolt comes down to your specific needs and budget. Steel City and National Hardware offer high-quality, durable options, while Hillman Group and Everflow Supplies are notable for their affordability. For those needing U-bolts for heavy-duty applications, Bolt Dropper's offerings are hard to beat.

No matter which you choose, remember that a U-bolt's performance is only as good as its installation. Be sure to follow the manufacturer's instructions for the best results. Also, keep in mind that U-bolts should be inspected regularly for signs of wear or damage, and replaced as necessary to ensure optimal performance and safety.