80mm Square Galvanised Chassis U-Bolt

Part No: U80S120GH Category:


77 in stock

Internal Width: 80mm
Internal Leg Length:
Thread Length: 50mm

77 in stock

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80mm Square Galvanised U Bolt – Nylocks – Washer

80mm square galvanised  U-Bolt by Couplemate can be supplied bulk with nuts and washers on the threads in boxes of 50.

Rolled threads with gal flat washer + gal nylock. The thread length is 60mm.

How do I calculate the correct length, measure

  • Spring width plus
  • Axle Pad 8mm plus
  • Axle width plus
  • Nylock plus
  • 5mm thread through nylock

For example, 3 leaf slipper on 39mm Round axle is

18mm Spring + 8mm Axle spacer + 39mm axle + Nylock 15mm + 5mm

Total U-bolt minimum length = 120mm

How to Measure U-bolts (example)

It is important you retighten U bolts approx 200lkms after installation due to steel’s ability to stretch a little under load.

U bolts are a major cause of caravan wheel alignment problems.

U bolts generally fail due to hydrogen embrittlement. Hydrogen embrittlement occurs during bending and galvanising. At Couplemate, we have an extra process that removes hydrogen embrittlement to produce st class u bolts.

We stress-tested these u bolts during manufacture and batch test until destruction.

Destruction loads exceed 17,000kg for 1/2 inch galvanised u bolts.

Our u bolts are derated to 375kg each or 1500kg per set of 4 or enough u bolts to suit a single axle.

The max rating of 60mm Round axles is 3000kg with u bolt rating @ 1500kg.

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

Additional information

Weight0.5 kg
Dimensions12 × 10 × 1 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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