Best U Bolts in 2026
Daisy
Last Updated: Feb 6, 2026
Daisy
Last Updated: Feb 6, 2026
* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Designed for home and industrial applications
Hex nut included
Standard machine screw threads
Manufactured from steel wire
Manufactured from steel wire
Designed for home and farm applications
Hex nut included
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Square U-bolts are great for attachment to square shaped posts
Includes hex nuts and plate
U-bolt measurements are as follows: diameter-thread count x inside length x inside width
Item sold individually
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Designed for securing various products to rectangular wood and metal objects
Plates included
Nuts included
Manufactured from steel wire
Zinc plated finish
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| uxcell | 9.95 | ✅ | ✅ | ✅ |
Thread Dia.: M6; Fit Rod Size: 16mm / 0.63"; Rod Diameter: 5.2mm / 0.2"; Total Length: 46mm / 1.81"
Hex Nut Size: 10 x 5mm / 0.39" x 0.2"(Hex Width*H); Frame Plate Size: 50 x 18 x 2mm/ 1.97" x 0.71" x 0.08"(L*W*T)
Round Washers Size: 18 x 6 x 1mm / 0.71" x 0.24" x 0.04"(OD*ID*T); Package Content: 4 x U-Bolt, 8 x Nuts, 8 x Round Washers, 4 x Plates
Material: Steel construct u bolt, galvanized surface treatment, bending forming processing technology with great performance in antirust and corrosion resistance, high hardness and good tensile strength.
Application: U-bolt is used to fasten or attach locking components to pipes, wood, etc. Just insert and tighten the nuts at both ends. It is suitable for the connection of boats, pipelines, trailers, and industrial steel structure conduits.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| uxcell | 9.95 | ✅ | ✅ | ✅ |
Thread Dia.: M6; Fit Rod Size: 20mm / 0.79"; Rod Diameter: 5.2mm / 0.2"; Total Length: 50mm / 1.97"
Hex Nut Size: 10 x 5mm / 0.39" x 0.2"(Hex Width*H); Frame Plate Size: 50 x 18 x 2mm / 1.97" x 0.71" x 0.08"(L*W*T)
Round Washers Size: 18 x 6 x 1mm / 0.71" x 0.24" x 0.04"(OD*ID*T); Package Content: 4 x U-Bolt, 8 x Nuts, 8 x Round Washers, 4 x Plates
Material: Steel construct u bolt, galvanized surface treatment, bending forming processing technology with great performance in antirust and corrosion resistance, high hardness and good tensile strength.
Application: U-bolt is used to fasten or attach locking components to pipes, wood, etc. Just insert and tighten the nuts at both ends. It is suitable for the connection of boats, pipelines, trailers, and industrial steel structure conduits.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| HECASAUSA | 9.50 | ❌ | ❌ | ❌ |
Fitment: This Galvanized Square U-Bolts were well crafted , can be used on trailers, boats or any other application that fits.
This galvanized square U-Bolt can be easily fixed on boats and trailers. The Square U-Bolts were well Galvanized , make it steadier and solider, uneasy to be corroded or deformed.
Good quality & simple to fix, durable & cost-effective!
Specification: Item type: Square U-bolts; Condition: Brand New; Color: Silver; Material: Steel: Surface finish: Galvanized.
Package Include：4 x 1/2"x 3 1/16"x 4 5/16" Squared U-Bolt. 8 x Galvanized Nuts. 8 x Galvanized lock washers. 8 x Galvanized flat washers.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| uxcell | 9.95 | ✅ | ✅ | ✅ |
Application: U-bolt is used to fasten or attach locking components to pipes, wood, etc. Just insert and tighten the nuts at both ends. It is suitable for the connection of boats, pipelines, trailers, and industrial steel structure conduits.
Material: 304 stainless steel u bolt is anti-rust and corrosion-resistant, with strong tensile strength. Suitable for outdoor, wet environment use.
Thread: M6; Groove Width: 35mm / 1.38"; Overall Size: 75 x 47mm / 2.95" x 1.85"(L*W)
Fit Square Rod Size: 35mm / 1.38"; Thread Length: 60(+/-5)mm / 2.36"; Center-Line Width: 42mm / 1.65"
Rod Diameter: 5.2mm / 0.2; Hex Nut Width: 10mm / 0.39";Strength Grade: 6.8; Package Content: 2 x u-bolt, 4 x Nuts, 2 x Plates
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| PLEXSUPPLY. | 9.87 | ✅ | ✅ | ✅ |
Item Package Height: 0.4 Centimeters
Item Package Length: 6.2 Centimeters
Item Package Width: 53.34 Centimeters
Product Type: Outdoor Living
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| RDEXP | 9.81 | ✅ | ✅ | ✅ |
bolt material:304 stainless steel
Bolts are resistant to atmospheric environmentally friendly
Passivated for superior environmentally friendly
suitable pipeline :diameter 0.87inch
5pcs in package
It is recommended to use a lubricant during installation to prevent galling.
Use a hand wrench or socket ratchet when installing the nut. Do not use power tools or tools with excessive impact force to tighten the nuts.
Mainly used to fix or connect the locked parts to tubular products or sheet products, such as pipe, wood, etc. Suitable for boats, plumbing, and other home and industrial applications
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| the 27th drop | 5.42 | ❌ | ❌ | ❌ |
DIMENSIONS: Pipe is 1.66 inches wide X 72 inches (6 feet) long
PREMIUM QUALITY: Hi-tensile properties of Tommy Dock post pipe enhances the rigidity and strength of your dock
HEAVY DUTY: Galvanized coating on the inside and outside of the pipes gives added durability
CORROSION RESISTANT: 50% more rust protection, 30% lighter and 15% stronger than commonly used dock pipe; Not suggested for use in salt or brackish waters
WARRANTY: Tommy Docks dock pipes are backed by a one year limited warranty
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Chengxin Home Building Materials | 9.86 | ✅ | ✅ | ✅ |
Material: The U-bolt is made of 304 stainless steel, which ensures strength on the basis of easy to use, rustproof, scratch-proof and corrosion resistan.
Size: Model: M8 x 60 x 100mm; Thread Size: M8; Total Height: 100mm/ 3.94"; Inner Width: 63mm / 2.5"
Advantage: The 304 stainless steel U-shaped bolt with a higher rust-proof level has a longer service life under the conditions of sun exposure and high coastal salt.
Easy to Install: hook the U-bolt around a square post, adjust plate to desired position, and secure tightly in place with a hex nut on each leg.
Application: Used to fix or connect the locked parts to square products or sheet products, such as railing, wood, etc. Suitable for boats, plumbing, and other home and industrial applications.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Worldtrend | 9.87 | ✅ | ✅ | ✅ |
10 Pcs U-bolts Material: Carbon steel Q235B , Finish: electrogalvanized, anti-corrosion, anti-rust
U pipe clamps thickness: 1.1 mm, U Pipe diameter: φ5.2 mm
Applicable round tube diameter: 1⅝ inches (Φ40mm )
Product size: 2¾"×2¾"×⅝"(70×70×17 mm)
U pipe clamps suitable for antenna clamps, antenna mast mounting accessories, automotive, plumbing and other home and industrial applications
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Worldtrend | 9.87 | ✅ | ✅ | ✅ |
Carbon steel Q235B, surface electro-galvanized, anti-corrosion, anti-rust
The inside diameter of the U is nominally 3½" .The threads are 2" in length.
Product size: 5"×5⅛"×1"(128×130×25mm), Thickness :3 mm, diameter : φ7mm
U pipe clamps used to fix or connect the locked parts to pipes, wood, etc. Suitable for boats, plumbing, and other home and industrial applications.
Package Content: 10xU-Bolt, 20xWashers, 20x Nuts, 10x Frame
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| ccfashion2017 | 7.36 | ❌ | ❌ | ❌ |
Material: Made of high-quality stainless steel with exquisite workmanship, excellent workmanship, and long service life
Usage: It can be used in the machinery industry, automotive industry, aviation aluminum, packaging industry, etc., with a wide range of uses.
Features: Durable, full texture, stable and reliable, guaranteed product quality, complete specifications, to meet different needs.
Size: Complete specifications, with a wide selection of sizes. When placing an order, choose the size and quantity based on the actual situation.
Advantages: Made of excellent stainless steel, with good gloss, not easy to rust and oxidize, solid structure, strong bearing capacity, and not easy to deform and bend.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Mallxiugull | 9.89 | ✅ | ✅ | ✅ |
Universal Size: the marine U bolt Thread Size: M8, 2.5 inch/ 63 mm in width and 3.94 inch/ 100 mm in length; Thread Length: 1.57 inch/ 40 mm, right size to satisfy your different fastening needs; Please check the size before buying
Ample Quantity: you will receive 12 sets of square U bolts in zinc, including 12 pieces of u bolts, 12 pieces of frame plates and 24 pieces of nuts, which are enough to fulfill your diverse needs for fastening and replacement
Hard and quality: the square U bolt clamp is made of carbon steel material, with zinc plated, sturdy and reliable, featuring nice rust and corrosion resistance, each bolt can bear weight and still performs well in rainy and humid environments
Scope of Applications: the carbon steel bolts can be widely applied in various fields, including industry, manufacturing, maintenance, the automotive sector, clothing production and more, an ideal choice for fastening tubes, woods, trailer, and so on
Please note: it is recommended to use lubricant when installing the U bolts for boat trailer to prevent wear and tear; Use a manual wrench or socket ratchet (not included) when installing nuts; Do not use high speed power tools or impact tools to tighten the nuts
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| Uxcell | 3 |
| Gbgs | 2 |
| National Hardware | 2 |
| Certbuy | 1 |
| Dunzy | 1 |
| Hardware Essentials | 1 |
| Kuafu | 1 |
| Mintcraft | 1 |
| Rdexp | 1 |
| Tommy Docks | 1 |
We've carried out a comprehensive analysis of 1,380 reviews on u bolts, using our selection criteria to identify the best options in the fasteners. Our findings reveal that most customers typically select u bolts priced around $19.40, with top brands including uxcell, cdoky, singry, aopin, national hardware, bcsgj, mintcraft, certbuy and libra and g-plus
Our team of expert editors reviewed these high-quality items and handpicked the top 15 u bolts for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the fasteners category. These include uxcell, mingyaah, cooly, aopin-us, amazon.com, bcsgj, plexsupply., chengxin home building materials and libra trailer parts and yellowspeed .
We are dedicated to assisting our users in finding the right u-bolts Products based on their needs, saving them considerable time when choosing which u bolts to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.
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