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Boat Trailer U-Bolts

Check out our Selection of Trailer U-Bolts to fit all your Needs! We have all shapes and sizes available! Square and Round U-Bolts, Stainless Steel Boat Trailer U-Bolts, Hot-Dipped Galvanized Boat Trailer U-Bolts, and Zinc Plated Trailer U-Bolts. From 3/8 inch diameter to 1/2 inch diameter! All U Bolts come with necessary hardware. These U Bolts are stock for all types of Boat Trailers. They will mount Bunk Brackets, Cross-members, Guide Poles, Leaf Springs, Trailer Axles, and much much more. 
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Boat Trailer Leaf Spring Shackle Galvanized 2 1/4 inch Center Hole
Item Sku: 100289
MPN: N/A

For Use with 1/2" Leaf Spring Bolts

Used for Double Eye Leaf Springs or U Bolt Plate

Hot Dipped Galvanized Finish Great for Boat Trailers
Spring Shackle Galvanized Strap Link for boat Trailer Leaf Spring Suspension
$2.50
In Stock
Boat Trailer Leaf Spring Shackle Galvanized 2 1/2 inch Center Hole
Item Sku: 100290
MPN: 20016G

For Use with 1/2" Leaf Spring Bolts

Used for Double Eye Leaf Springs or U Bolt Plate

Hot Dipped Galvanized Finish Great for Boat Trailers
Spring Shackle Galvanized for Boat Trailer Double Eye Leaf Spring
$2.50
In Stock
Boat Trailer Leaf Spring Shackle Galvanized 3 1/2 inch Center Hole
Item Sku: 100291
MPN: 20017G

For Use with 1/2" Leaf Spring Bolts

Used for Double Eye Leaf Springs or U Bolt Plate

Hot Dipped Galvanized Finish Great for Boat Trailers
Spring Shackle Galvanized for Boat Trailer Leaf Spring Suspension
$2.50
In Stock
Trailer Leaf Spring Shackle Steel 2 1/2 in Center Hole, 3 3/4 in Overall
Item Sku: 100287
MPN: N/A

For Use with 9/16" Leaf Spring Bolts

Used for Double Eye Leaf Springs

Raw Steel Finish Can be Painted to Match your Trailers
Raw Steel Leaf Spring Shackle for 9/16 inch Spring Bolts
$2.50
In Stock
Trailer Leaf Spring Shackle Steel 3 1/8 in Center Hole, 4 3/8 in Overall
Item Sku: 100288
MPN: N/A

For Use with 9/16" Leaf Spring Bolts

Used for Double Eye Leaf Springs

Raw Steel Finish Can be Painted to Match your Trailers
Spring Shackle for 9/16 inch Spring Bolts 3 1/8 inches Center To Center
$2.99
In Stock
Trailer Leaf Spring Shackle Steel 2 1/4 in Center Hole, 3 1/2 in Overall
Item Sku: 100286
MPN: N/A

For Use with 9/16" Leaf Spring Bolts

Used for Double Eye Leaf Springs

Raw Steel Finish Can be Painted to Match your Trailers
Spring Shackle
$2.99
In Stock
Galvanized Square Ubolt 1/2x 2 1/16x 4 13/16
Item Sku: 100422
MPN: N/A

Mounts to 2" Wide/Tall Material - Fits up to 3 1/2" Tall Material

Popular uses: Axle U Bolts, Spring Sliders, Winch Post

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
1/2 x 2 1/16 x4 13/16 Galv Ubolt
$3.99
In Stock
Galvanized Square Ubolt 1/2 inch x 2 1/16 inch x 4 5/16 inch
Item Sku: 100423
MPN: US1201405G

Mounts to 2" Wide/Tall Material - Fits up to 3 1/2" Tall Material

Popular uses: Axle U Bolts, Spring Sliders, Winch Post

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
1/2 x 2 1/16 x4 5/16 Galv Ubolt
$3.99
In Stock
Galvanized Square Ubolt 3/8 inch x1 9/16 inch x 2 1/2 inch
Item Sku: 100426
MPN: N/A

Mounts to 1 1/2" Wide/Tall Material

Popular uses: Guide Poles

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
3/8 inch x 1 9/16 inch x2 1/2 inch Galv Ubolt
$3.99
In Stock
Galvanized Square Trailer U-Bolt 3/8 inch x 1 5/8 inch x 4 1/4 inch
Item Sku: 100720
MPN: N/A

Thread size 3/8"-16

Popular uses: Bunk Brackets, Guide Pole Brackets

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 3/8 inch x 1 5/8 inch x 4 1/4 inch
$3.99
In Stock
Galvanized Square Trailer U-Bolt 3/8 inch x 3 inch x 5 13/16 inch
Item Sku: 100727
MPN: N/A

Thread size 3/8"-16

Popular uses: Bunk Brackets, Guide Pole Brackets

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 3/8 inch x 3 inch x 5 13/16 inch
$3.99
In Stock
Zinc Plated Round Trailer U-Bolt 3/8 inch x 1 3/4 in x 2 7/8 in
Item Sku: 100730
MPN: N/A

Thread size 3/8"-16

Popular uses: Bunk Brackets, Guide Pole Brackets

Includes Zinc Plated and Galvanized Hardware
Zinc Plated Round Trailer U-Bolt 3/8 inch x 1 3/4 in x 2 7/8 in
$3.99
In Stock
Zinc Plated Square Trailer U-Bolt 3/8 inch x 2 inch x 5 3/8 inch
Item Sku: 100733
MPN: N/A

Thread size 3/8"-16

Popular uses: Bunk Brackets, Guide Pole Brackets

Includes Zinc Plated and Galvanized Hardware
Zinc PlatedTrailer U Bolt 3/8 inch x 2 inch x 5 3/8 inch
$3.99
In Stock
Galvanized Square Trailer U-Bolt 1/2 inch x 3 inch x 2 1/2 inch
Item Sku: 100753
MPN: N/A

Thread size 1/2"-13

Popular uses: Bunk Brackets, Roller Brackets, Spring Sliders, Winch Post Assembly

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 1/2 inch x 3 inch x 2 1/2 inch
$3.99
In Stock
Galvanized Square Trailer U-Bolt 1/2 inch x 3 inch x 5 5/16 inch
Item Sku: 100754
MPN: N/A

Thread size 1/2"-13

Popular uses: Bunk Brackets, Roller Brackets, Spring Sliders, Winch Post Assembly

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 1/2 inch x 3 inch x 5 51/6 inch
$4.50
In Stock
Galvanized Round Trailer U-Bolt 1/2 inch x 2 inch x 5 inch
Item Sku: 100740
MPN: N/A

Thread size 1/2"-13

Popular uses: Axle U Bolts

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 1/2 inch x 2 inch x 5 inch
$4.50
In Stock
Galvanized Round Trailer U-Bolt 1/2 inch x 2 3/8 inch x 5 3/8 inch
Item Sku: 100741
MPN: N/A

Thread size 1/2"-13

Popular uses: Axle U Bolts

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 1/2 inch x 2 3/8 inch x 5 3/8 inch
$4.50
In Stock
Galvanized Square U bolt 1/2 x 2 5/8 x 3 9/16
Item Sku: 100479
MPN: N/A

Thread size 1/2"-13

Popular uses: Bunk Brackets, Crossmembers, Axles, Roller Brackets

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
1/2 x 2 5/8 x3 9/16 Galv Ubolt
$4.50
In Stock
Galvanized Square Ubolt 1/2 inch x 2 1/16 inch x 5 5/16 inch
Item Sku: 100424
MPN: N/A

Mounts to 2" Wide/Tall Material - Fits up to 4 1/2" Tall Material

Popular uses: Axle U Bolts, Spring Sliders, Winch Post

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
1/2 x 2 1/16 x5 5/16 Galv Ubolt
$4.50
In Stock
Galvanized Square Ubolt 1/2 inch x 2 1/16 inch x 6 5/16 inch
Item Sku: 100425
MPN: N/A

Mounts to 2" Wide/Tall Material - Fits up to 5 1/2" Tall Material

Popular uses: Axle U Bolts, Spring Sliders, Winch Post

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
1/2 x 2 1/16 x6 5/16 Galv Ubolt
$4.50
In Stock
Galvanized U-Bolt 1/2 inch x 3 inch x 4 5/16 inch for Boat Trailer
Item Sku: 100408
MPN: N/A

Mounts to 3" Wide/Tall Material - Usually 3" wide x 3" tall Tubing

Popular uses: Bunk Brackets, Crossmembers, Roller Brackets

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
1/2 x 3 x4 5/16 Galv Ubolt
$4.50
In Stock
Galvanized U-Bolt 1/2 inch x 3 1/16 inch x 3 5/16 inch
Item Sku: 100413
MPN: N/A

Mounts to 3" Wide/Tall Material - Usually 2" Wide x 3" Tall Tubing

Popular uses: Bunk Brackets, Crossmembers, Roller Brackets

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
1/2 in x 3 1/16 in x 3 5/16 in Galv Ubolt
$4.50
In Stock
Galvanized Square Trailer U-Bolt 3/8 inch x 2 inch x 3 3/8 inch
Item Sku: 100721
MPN: N/A

Thread size 3/8"-16

Popular uses: Bunk Brackets, Guide Pole Brackets, Winch Stand

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 3/8 inch x 2 inch x 3 3/8 inch
$4.99
In Stock
Galvanized Square Trailer U-Bolt 3/8 inch x 2 inch x 4 3/8 inch
Item Sku: 100723
MPN: N/A

Thread size 3/8"-16

Popular uses: Bunk Brackets, Guide Pole Brackets, Winch Stand

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 3/8 inch x 2 inch x 4 3/8 inch
$4.99
In Stock
Galvanized Square Trailer U-Bolt 3/8 inch x 2 inch x 6 7/8 inch
Item Sku: 100724
MPN: N/A

Thread size 3/8"-16

Popular uses: Bunk Brackets, Guide Pole Brackets

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 3/8 inch x 2 inch x 6 7/8 inch
$4.99
In Stock
Galvanized Square Trailer U-Bolt 3/8 inch x 3 inch x 3 7/8 inch
Item Sku: 100726
MPN: N/A

Thread size 3/8"-16

Popular uses: Bunk Brackets, Guide Pole Brackets

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 3/8 inch x 3 inch x 3 7/8 inch
$4.99
In Stock
Galvanized U Bolt Plate for 3/8
Item Sku: 101127
MPN: 46-P4

Made 1/4" Thick Galvanized Steel

3/8" Holes Drilled 4 inches Apart

Great for securing Frame Material
Galvanized U bolt Mounting Plate for 3/8 inch diameter U Bolt
$4.99
In Stock
Galvanized U Bolt Plate for 3/8
Item Sku: 101128
MPN: 46-P3

Made 1/4" Thick Galvanized Steel

3/8" Holes Drilled 3 inches Apart

Great for U Bolts 3 inches Wide
Galvanized U bolt Mounting Plate for 3/8 inch diameter U Bolt
$4.99
In Stock
Galvanized U Bolt Plate for 3/8
Item Sku: 101129
MPN: 46-P2

Made 1/4" Thick Galvanized Steel

3/8" Holes Drilled 2 inches Apart

Great for U Bolts 2 inches Wide
Galvanized U bolt Mounting Plate for 3/8 inch diameter U Bolt
$4.99
In Stock
Boat Trailer Leaf Spring Shackle Galvanized 3 3/4 inch Center Hole
Item Sku: 100292
MPN: N/A

For Use with 1/2" Leaf Spring Bolts

Used for Double Eye Leaf Springs or U Bolt Plate

Hot Dipped Galvanized Finish Great for Boat Trailers
Spring Shackle Galvanized for boat Trailer Double Eye Trailer Leaf Spring Suspension
$5.50
In Stock
Zinc Plated Round Trailer U-Bolt 1/2 inch x 3 inch x 5 inch
Item Sku: 100749
MPN: N/A

Thread size 1/2"-13

Popular uses: Axle U Bolts

Includes Zinc Plated and Galvanized Hardware
Zinc Plated Round Trailer U-Bolt 1/2 inch x 3 inch x 5 inch
$5.99
In Stock
Galvanized Square Trailer U-Bolt 7/16 inch x 4 inch x 2 7/8 inch
Item Sku: 100735
MPN: N/A

Thread size 7/16"-14

Popular uses: Bunk Brackets

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 7/16 inch x 4inch x 2 7/8 inch
$5.99
In Stock
Galvanized Square Trailer U-Bolt 1/2 inch x 1 7/8 inch x 5 inch
Item Sku: 100736
MPN: N/A

Thread size 1/2"-13

Popular uses: Bunk Brackets, Spring Hangers, Axle U Bolt

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 1/2 inch x 1 7/8 inch x 5 inch
$5.99
In Stock
Galvanized Square Trailer U-Bolt 1/2 inch x 2 inch x 7 5/16 inch
Item Sku: 100737
MPN: N/A

Thread size 1/2"-13

Popular uses: Axle U Bolts, Frame U Bolts

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 1/2 inch x 2 inch x 7 5/16 inch
$5.99
In Stock
Galvanized Square Trailer U-Bolt 1/2 inch x 3 inch x 6 5/16 inch
Item Sku: 100755
MPN: N/A

Thread size 1/2"-13

Popular uses: Bunk Brackets, Roller Brackets, Spring Sliders, Winch Post Assembly

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 1/2 inch x 3 inch x 6 51/6 inch
$5.99
In Stock
Galvanized Square Trailer U-Bolt 1/2 inch x 4 inch x 2 13/16 inch
Item Sku: 100769
MPN: N/A

Thread size 1/2"-13

Popular uses: Bunk Brackets, Roller Brackets, Spring Sliders, Winch Post Assembly

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 1/2 inch x 4 inch x 2 13/16 inch
$5.99
In Stock
Galvanized Square Trailer U-Bolt 1/2 inch x 2 5/8 inch x 4 9/16 inch
Item Sku: 100752
MPN: N/A

Thread size 1/2"-13

Popular uses: Axle U Bolts, Cross Member, Frame Components

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 1/2 inch x 2 5/8 inch x 4 9/16 inch
$6.50
In Stock
Stainless Steel Round Trailer U-Bolt 3/8 inch x 1 3/4 in x 2 11/16 in
Item Sku: 100728
MPN: N/A

Thread size 3/8"-16

Popular uses: Bunk Brackets, Guide Pole Brackets

Stainless Steel will not Rust - Includes Stainless Steel Hardware
Stainless Steel Round Trailer U-Bolt 3/8 inch x 1 3/4 in x 2 11/16 in
$6.50
In Stock
Stainless Steel Square Ubolt 3/8 inch x1 9/16 inch x 2 1/2 inch
Item Sku: 100427
MPN: N/A

Mounts to 1 1/2" Wide/Tall Material

Popular uses: Guide Poles

Stainless Steel Finish Great for Boat Trailers - Includes Hardware
3/8 in x 1 9/16 in x2 1/2 in Stainless Steel Ubolt
$6.50
In Stock
Zinc Plated Square Trailer U-Bolt 1/2 inch x 2 1/2 inch x 5 1/4 inch
Item Sku: 100751
MPN: N/A

Thread size 1/2"-13

Popular uses: Cross Member, Frame Components

Includes Zinc Plated and Galvanized Hardware
Zinc Plated Trailer U Bolt 1/2 inch x 2 1/2 inch x 5 1/4 inch
$6.99
In Stock
Galvanized Square Trailer U-Bolt 1/2 inch x 2 5/16 inch x 5 11/16 inch
Item Sku: 100738
MPN: N/A

Thread size 1/2"-13

Popular uses: Sring Slider, Frame U Bolts

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 1/2 inch x 2 5/16inch x 5 11/16 inch
$6.99
In Stock
Galvanized Square Trailer U-Bolt 1/2 inch x 2 5/16 inch x 7 1/4 inch
Item Sku: 100739
MPN: N/A

Thread size 1/2"-13

Popular uses: Sring Slider, Frame U Bolts

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 1/2 inch x 2 5/16inch x 7 1/4 inch
$6.99
In Stock
Zinc Plated Square Trailer U-Bolt 1/2 inch x 2 inch x 3 1/2 inch
Item Sku: 100747
MPN: N/A

Thread size 1/2"-13

Popular uses: Bunk Bracket, Roller Bracket Winch Post

Includes Zinc Plated and Galvanized Hardware
Zinc Plated Trailer U Bolt 1/2 inch x 2 inch x 3 1/2 inch
$6.99
In Stock
Stainless Steel Boat Trailer Leaf Spring Shackle  2 1/2 inch Center Hole
Item Sku: 101407
MPN: 25421

For Use with 1/2" Leaf Spring Bolts

Used for Double Eye Leaf Springs or U Bolt Plate

Full Stainless Steel - Great for Boat Trailers
Spring Shackle Stainless Steel for Boat Trailer Double Eye Leaf Spring
$6.99
In Stock
Zinc Plated Round Trailer U-Bolt 1/2 inch x 3 inch x 7 inch
Item Sku: 100750
MPN: N/A

Thread size 1/2"-13

Popular uses: Axle U Bolts

Includes Zinc Plated and Galvanized Hardware
Zinc Plated Round Trailer U-Bolt 1/2 inch x 3 inch x 7 inch
$7.99
In Stock
Stainless Steel Square Trailer U-Bolt 3/8 inch x 3 in x 3 7/8 in
Item Sku: 100888
MPN: N/A

Thread size 3/8"-16

Popular uses: Bunk Brackets, Guide Pole Brackets

Stainless Steel will not Rust - Includes Stainless Steel Hardware
Stainless Steel Square Trailer U-Bolt 3/8 inch x 3 in x 3 7/8 in
$7.99
In Stock
Galvanized Square Trailer U-Bolt 1/2 inch x 4 5/16 inch x 7 1/2 inch
Item Sku: 100767
MPN: N/A

Thread size 1/2"-13

Popular uses: Bunk Brackets, Roller Brackets, Spring Sliders, Winch Post Assembly

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 1/2 inch x 4 5/16 inch x 7 1/2 inch
$7.99
In Stock
Galvanized Square Trailer U-Bolt 1/2 inch x 3 inch x 7 3/4 inch
Item Sku: 100756
MPN: N/A

Thread size 1/2"-13

Popular uses: Bunk Brackets, Roller Brackets, Spring Sliders, Winch Post Assembly

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 1/2 inch x 3 inch x 7 3/4 inch
$7.99
In Stock
Galvanized Square Trailer U-Bolt 1/2 inch x 3 3/8 inch x 6 3/16 inch
Item Sku: 100758
MPN: N/A

Thread size 1/2"-13

Popular uses: Bunk Brackets, Roller Brackets, Spring Sliders, Winch Post Assembly

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 1/2 inch x 3 3/8 inch x 6 3/16
$7.99
In Stock
Galvanized Square Trailer U-Bolt 3/8 inch x 2 inch x 8 inch
Item Sku: 100725
MPN: N/A

Thread size 3/8"-16

Popular uses: Bunk Brackets, Guide Pole Brackets

Hot Dipped Galvanized Finish Great for Boat Trailers - Includes Hardware
Hot Dipped Galvanized Trailer U Bolt 3/8 inch x 2 inch x 8 inch
$7.99
In Stock
 
 
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