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    Axle U-Bolts & U-Bolt Kits

    Trailer U-Bolts & U-Bolt Kits are used to mount a square or round axle to the trailer's leaf springs. U-bolts are round, square and come with a variety of sizes and finished. Browse the large selection of top quality siraweb.com U-bolts & U-bolt kits from top brands. Low prices, fast shipping and no hassle returns, order today!

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    Trailer Axle Round U-Bolt 1/2", 20 threads, CE Smith 21000ZY

    Trailer Axle Round U-Bolt 1/2", 20 threads, CE Smith 21000ZY

    Round trailer axle U-Bolt, yellow zinc coated to resist rust and corrosion. Diameter: 1/2 inch, threading: 20, distance between legs: 3.15 inches, leg length: 7 inches. Sold each, nuts and washers sold separately.
    $6.99 $4.49
    Trailer Axle Round U-Bolt 3/8", 16 threads, CE Smith 21008ZN

    Trailer Axle Round U-Bolt 3/8", 16 threads, CE Smith 21008ZN

    Round trailer axle U-Bolt, yellow zinc coated to resist rust and corrosion. Diameter: 3/8 inch, threading: 16, distance between legs: 1.92 inches, leg length: 4 inches. Sold each, nuts and washers sold separately.
    $3.99 $2.49
    Trailer Axle Round U-Bolt Kit, 1.75" by 4.8", Tie Down Eng LR86216

    Trailer Axle Round U-Bolt Kit, 1.75" by 4.8", Tie Down Eng LR86216

    Trailer Axle U-Bolt Kit includes 2 round zinc plated U-Bolts, 4 lock nuts and 4 washers. Rod size: 3/8", threading 16. Leg span: 1-3/4". Leg length: 4-13/16". Thread length: 1-3/4".
    $7.49 $4.99
    Trailer Axle Round U-Bolt Kit, 2.4" by 5.4", Tie Down Eng LR86217

    Trailer Axle Round U-Bolt Kit, 2.4" by 5.4", Tie Down Eng LR86217

    Trailer Axle U-Bolt Kit includes 2 round zinc plated U-Bolts, 4 lock nuts and 4 washers. Rod size: 1/2", threading 13. Leg span: 2-3/8". Leg length: 5-3/8". Thread length: 2".
    $11.99 $7.99
    Trailer Axle Round U-Bolt Kit, 3.1" by 6.7", Tie Down Eng LR86218

    Trailer Axle Round U-Bolt Kit, 3.1" by 6.7", Tie Down Eng LR86218

    Trailer Axle U-Bolt Kit includes 2 round zinc plated U-Bolts, 4 lock nuts and 4 washers. Rod size: 1/2", threading 13. Leg span: 3-1/16". Leg length: 6-11/16". Thread length: 2".
    $13.49 $8.99
    Trailer Axle Round U-Bolt, 1.75" by 4.25", Reliable Machine UB-R-120

    Trailer Axle Round U-Bolt, 1.75" by 4.25", Reliable Machine UB-R-120

    Single Round Trailer Axle U-Bolt, zinc plated. Bolt Diameter: 1/2", between legs: 1-3/4", leg length: 4-1/4", thread length: 2". Sold each. Nuts and Washers are NOT included.
    $5.99 $3.49
    Trailer Axle Round U-Bolt, 1.75" by 4-13/16", Tie Down Eng 10967Z

    Trailer Axle Round U-Bolt, 1.75" by 4-13/16", Tie Down Eng 10967Z

    Single Round Trailer Axle U-Bolt, zinc plated. Rod size: 3/8", threading 16. Leg span: 1-3/4". Leg length: 4-13/16". Thread length: 1-3/4". Sold each. Lock nuts and washers NOT included.
    $2.99 $1.99
    Trailer Axle Round U-Bolt, 2 .5" by 5.25", Reliable Machine UB-R-220

    Trailer Axle Round U-Bolt, 2 .5" by 5.25", Reliable Machine UB-R-220

    Single Round Trailer Axle U-Bolt, zinc plated. Bolt Diameter: 1/2", between legs: 2.5", leg length: 5.25", thread length: 2.25". Sold each. Nuts and Washers are NOT included.
    $5.99 $3.99
    Trailer Axle Round U-Bolt, 2-3/8" by 5-3/8", Tie Down Eng 84751Z

    Trailer Axle Round U-Bolt, 2-3/8" by 5-3/8", Tie Down Eng 84751Z

    Single Round Trailer Axle U-Bolt, zinc plated. Rod size: 1/2", threading 13. Leg span: 2-3/8". Leg length: 5-3/8". Thread length: 2". Sold each. Lock nuts and washers NOT included.
    $4.99 $2.99
    Trailer Axle Round U-Bolt, 3.1" by 6", Reliable Machine UB-R-320

    Trailer Axle Round U-Bolt, 3.1" by 6", Reliable Machine UB-R-320

    Single Round Trailer Axle U-Bolt, zinc plated. Bolt Diameter: 1/2", between legs: 2", leg length: 6", thread length: 2". Sold each. Nuts and Washers are NOT included.
    $8.99 $5.99
    Trailer Axle Round U-Bolt, 3.1" by 7", Reliable Machine UB-R-322

    Trailer Axle Round U-Bolt, 3.1" by 7", Reliable Machine UB-R-322

    Single Round Trailer Axle U-Bolt, zinc plated. Bolt Diameter: 1/2", between legs: 3-1/8", leg length: 7", thread length: 2". Sold each. Nuts and Washers are NOT included.
    $8.99 $5.99
    Trailer Axle Round U-Bolt, 3/8" by 4.25", Martin Wheel 11-54

    Trailer Axle Round U-Bolt, 3/8" by 4.25", Martin Wheel 11-54

    Single Round Trailer Axle U-Bolt, zinc plated. Rod size: 3/8", threading 24. Leg span: 1-7/8". Leg length: 4-1/4". Thread length: 1-3/4". Sold each. Lock nuts and washers NOT included.
    $4.99 $2.99
    Trailer Axle Round U-Bolt,, 3.1" by 6.7", Tie Down Eng 84758Z

    Trailer Axle Round U-Bolt,, 3.1" by 6.7", Tie Down Eng 84758Z

    Single Round Trailer Axle U-Bolt, zinc plated. Rod size: 1/2", threading 13. Leg span: 3-2/16". Leg length: 6-11/16". Thread length: 2". Sold each. Lock nuts and washers NOT included.
    $5.99 $3.49
    Trailer Axle Square U-Bolt 1/2", 20 threads, CE Smith 22017ZY

    Trailer Axle Square U-Bolt 1/2", 20 threads, CE Smith 22017ZY

    Round trailer axle U-Bolt, yellow zinc coated to resist rust and corrosion. Diameter: 1/2 inch, threading: 20, distance between legs: 2.12 inches, leg length: 4.5 inches. Sold each, nuts and washers sold separately.
    $6.99 $4.49
    Trailer Axle Square U-Bolt 3/8", 16 threads, CE Smith 22003ZY

    Trailer Axle Square U-Bolt 3/8", 16 threads, CE Smith 22003ZY

    Round trailer axle U-Bolt, yellow zinc coated to resist rust and corrosion. Diameter: 3/8 inch, threading: 16, distance between legs: 1.67 inches, leg length: 3-3/8 inches. Sold each, nuts and washers sold separately.
    $5.99 $3.49
    Trailer Axle Square U-Bolt Kit, 1.5" by 4.1", Tie Down Eng LR86213

    Trailer Axle Square U-Bolt Kit, 1.5" by 4.1", Tie Down Eng LR86213

    Trailer Axle U-Bolt Kit includes 2 square zinc plated U-Bolts, 4 lock nuts and 4 washers. Rod size: 1/2", threading 13. Leg span: 1-9/16". Leg length: 4-1/16". Thread length: 2".
    $9.99 $6.49
    Trailer Axle Square U-Bolt Kit, 1.6" by 3.5", Tie Down Eng LR86219

    Trailer Axle Square U-Bolt Kit, 1.6" by 3.5", Tie Down Eng LR86219

    Trailer Axle U-Bolt Kit includes 2 square zinc plated U-Bolts, 4 lock nuts and 4 washers. Rod size: 3/8", threading 16. Leg span: 1-5/8". Leg length: 3-9/16". Thread length: 1-3/4".
    $6.99 $4.49
    Trailer Axle Square U-Bolt Kit, 1.6" by 3.6", Tie Down Eng LR86212

    Trailer Axle Square U-Bolt Kit, 1.6" by 3.6", Tie Down Eng LR86212

    Trailer Axle U-Bolt Kit includes 2 square zinc plated U-Bolts, 4 lock nuts and 4 washers. Rod size: 7/16", threading: 14, Leg Span: 1-9/16", Leg length: 3-9/16", Thread length: 2"
    $8.49 $5.49
    Trailer Axle Square U-Bolt Kit, 2.1" by 2.3", Tie Down Eng LR86228

    Trailer Axle Square U-Bolt Kit, 2.1" by 2.3", Tie Down Eng LR86228

    Trailer Axle U-Bolt Kit includes 2 square zinc plated U-Bolts, 4 lock nuts and 4 washers. Rod size: 7/16", threading: 14, Leg span: 2-1/16", Leg length: 2-5/16", Thread length: 1".
    $6.99 $4.49
    Trailer Axle Square U-Bolt Kit, 2.1" by 4", Tie Down Eng 86204

    Trailer Axle Square U-Bolt Kit, 2.1" by 4", Tie Down Eng 86204

    Trailer Axle U-Bolt Kit includes 2 square zinc plated U-Bolts, 4 lock nuts and 4 washers. Rod size: 1/2", threading: 13, Leg span: 2-1/8", Leg length: 4", Thread length: 2".
    $16.49 $10.99
    Trailer Axle Square U-Bolt Kit, 2.1" by 4", Tie Down Eng LR86208

    Trailer Axle Square U-Bolt Kit, 2.1" by 4", Tie Down Eng LR86208

    Trailer Axle U-Bolt Kit includes 2 square zinc plated U-Bolts, 4 lock nuts and 4 washers. Rod size: 3/8", threading: 16, Leg span: 2-1/8", Leg length: 4", Thread length: 1-3/4".
    $7.49 $4.99
    Trailer Axle Square U-Bolt Kit, 2.1" by 4.3", Tie Down Eng LR86229

    Trailer Axle Square U-Bolt Kit, 2.1" by 4.3", Tie Down Eng LR86229

    Trailer Axle U-Bolt Kit includes 2 square zinc plated U-Bolts, 4 lock nuts and 4 washers. Rod size: 7/16", threading 14, Leg span: 2-1/16", Leg length: 4-5/16", Thread length: 2".
    $8.99 $5.99
    Trailer Axle Square U-Bolt Kit, 2.1" by 4.8", Tie Down Eng LR86215

    Trailer Axle Square U-Bolt Kit, 2.1" by 4.8", Tie Down Eng LR86215

    Trailer Axle U-Bolt Kit includes 2 square zinc plated U-Bolts, 4 lock nuts and 4 washers. Rod size: 1/2", threading 13, Leg span: 2-1/16", Leg length: 4-13/16", Thread length: 2".
    $11.49 $7.49
    Trailer Axle Square U-Bolt Kit, 3.1" by 3", Tie Down Eng LR86205

    Trailer Axle Square U-Bolt Kit, 3.1" by 3", Tie Down Eng LR86205

    Trailer Axle U-Bolt Kit includes 2 square zinc plated U-Bolts, 4 lock nuts and 4 washers. Rod Size: 1/2", threading 13, Leg Span: 3-1/8", Leg Length: 3", Thread Length: 1-1/2".
    $9.99 $6.49
    Trailer Axle Square U-Bolt Kit, 3.1" by 3", Tie Down Eng LR86209

    Trailer Axle Square U-Bolt Kit, 3.1" by 3", Tie Down Eng LR86209

    Trailer Axle U-Bolt Kit includes 2 square zinc plated U-Bolts, 4 lock nuts and 4 washers. Rod Size: 3/8", threading 16, Leg span: 3-1/8", Leg length: 3", Thread length: 1-3/4".
    $6.99 $4.49
    Trailer Axle Square U-Bolt Kit, 3.1" by 3.3", Tie Down Eng LR86230

    Trailer Axle Square U-Bolt Kit, 3.1" by 3.3", Tie Down Eng LR86230

    Trailer Axle U-Bolt Kit includes 2 square zinc plated U-Bolts, 4 lock nuts and 4 washers. Rod size: 7/16", threading 14, Leg span: 3-1/16", Leg length: 3-5/16", Thread length: 1-3/4".
    $8.99 $5.99
    Trailer Axle Square U-Bolt Kit, 3.1" by 3.8", Tie Down Eng LR86214

    Trailer Axle Square U-Bolt Kit, 3.1" by 3.8", Tie Down Eng LR86214

    Trailer Axle U-Bolt Kit includes 2 square zinc plated U-Bolts, 4 lock nuts and 4 washers. Rod size: 1/2", threading 13, Leg span: 3-1/16", Leg length: 3-13/16", Thread length: 1-1/2".
    $10.99 $6.99
    Trailer Axle Square U-Bolt Kit, 3.1" by 4", Tie Down Eng LR86206

    Trailer Axle Square U-Bolt Kit, 3.1" by 4", Tie Down Eng LR86206

    Trailer Axle U-Bolt Kit includes 2 square zinc plated U-Bolts, 4 lock nuts and 4 washers. Rod size: 1/2", threading 13, Leg span: 3-1/8", Leg length: 4", Thread length: 2".
    $10.99 $6.99
    Trailer Axle Square U-Bolt Kit, 3.1" by 4.3", Tie Down Eng LR86231

    Trailer Axle Square U-Bolt Kit, 3.1" by 4.3", Tie Down Eng LR86231

    Trailer Axle U-Bolt Kit includes 2 square zinc plated U-Bolts, 4 lock nuts and 4 washers. Rod size: 7/16", threading 14, Leg span: 3-1/16", Leg length: 4-5/16", Thread length: 2".
    $8.99 $5.99
    Trailer Axle Square U-Bolt Kit, 4.1" by 2.8", Tie Down Eng LR86234

    Trailer Axle Square U-Bolt Kit, 4.1" by 2.8", Tie Down Eng LR86234

    Trailer Axle U-Bolt Kit includes 2 square zinc plated U-Bolts, 4 lock nuts and 4 washers. Rod size: 7/16", threading 14, Leg span: 4-1/16", Leg length: 2-13/16", Thread length: 1-3/4".
    $8.99 $5.99
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