50mm Square Galvanised U-Bolt – 137mm Long

Part No: UBOLT-50S137-H Category: Tag:
Part No: UBOLT-50S137-H Category: Tag:

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137mm x 50mm Square Galvanised U Bolt Kit with Gal Nylocks and Gal Washers

The 137mm x 50mm square U bolt is a sturdy and reliable option for axles to caravans and boat trailers.

This U-bolt is made from galvanised steel and is resistant to rust and corrosion.

The U bolt has galvanized nylocks and washers, ensuring a secure and tight fit. Its square shape provides added stability and strength, making it a popular choice for heavy-duty applications.

We carry good Premium 50mm Square U-Bolts stocks for immediate Express Dispatch.

U-bolts, washers and nylocks are galvanised against corrosion and are suitable for marine environments.

Further, the 50mm square galvanised Australian U bolt has rolled threads instead of cut threads. Additionally,

  • the thread length is 60mm.
  • The thread size is 1/2 inch BSW.

Purchase U-Bolt kits with clamps here.

50mm U Bolt Lengths

Four elements uniquely define any Ubolt, they are:

  1. Material type (for example, bright zinc-plated mild steel or galvanised)
  2. Thread dimensions (for standard 1/2 inch )
  3. Inside diameter (for example, 50 mm – the distance between the legs)
  4. Inside height (for example, 125 mm)

Mild steel stretches under load. It is essential that you re-tighten the u-bolts approximately 200 km after installation.

Measuring UboltsLoose U-bolts cause accidents.

Vibration fatigue can loosen u-bolts if not re-tightened after 300 km.

Excellent article on vibration fatigue here.

How U Bolts Sizes are Measured

Measure from the inside of the U-bolt or the width of the tube.

For example, The 250mm U-Bolt Kit is 250mm when measured from the thread’s tip to the top’s underside.

The U-Bolt kit Comprises

  • 1 x galvanised U-Bolt
  • 2 x galvanised Washers
  • 2 x galvanised Nylocks

Mild steel stretches under load. It is essential that you re-tighten the u-bolts approximately 200 km after installation.

U-Bolt Specifications

  • The thread length is 60mm.
  • The thread size is 1/2 inch BSW.

Also, review U-Bolt kits with clamps in our trailer parts shop

Galvanised U-Bolt 45mm Square Clamp Kits are listed below

Additional information

Weight0.4 kg
Dimensions10 × 10 × 2 cm

Our Service Lifetime Warranty

Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.

Couplemate™ is a manufacturer and vendor of high-quality towing, trailer, and caravan components. Couplemate™ Core Goods and Custom Work are guaranteed to be free of defects for the service lifetime of the product when used as intended.

Warranties are non-transferrable and Couplemate™ requires satisfactory proof of purchase prior to issuing a remedy. The full Couplemate™ Warranty Policy can be found in the Terms & Conditions: Section 8 – Consumer Guarantees & Warranty.

Warranties are in addition to your rights under the Australian Consumer Law. If something is wrong with your order, please contact our team.

60-Day Returns

After 60 years of experience, we know that life has its unpredictable moments.

All Couplemate™ orders (online, over the phone, or in-store) have a 60 day period for change-of-mind returns and exchanges. There are some items that can’t be returned and some returns may incur a 15% restocking fee.

You can view our full policy for change-of-mind returns here.

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