56mm Square Galvanised Chassis U-Bolt
$10.00 – $12.00
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56mm Square Galvanised Chassis U-Bolt, incl Nylocks and Washers
56mm square galvanised u-bolt includes nylocks and washers. The 56mm u-bolt secures mudguard and spring brackets on galvanised boat trailers.
U-bolts have rolled 1/2-inch threads and include a galvanised flat washer and galvanised nylock. The thread length is 60mm.
56mm square u-bolts are available in various lengths to suit multiple chassis rail thicknesses.
U-bolts must be re-tightened approximately 300 km after installation due to the steel’s ability to stretch slightly under load.
This article is a good read on why U-bolts should be checked when first installed.
Once you have re-tightened your U-bolts the final time, you should never have to recheck them. Once the mild steel stretches the first time, you should expect the final tighten to be 1/4 to 1/2 turn.
Stress Tests
Break loads exceed 17t for 1/2 inch galvanised u bolts.
U-bolts are de-rated to 375kg each or 1.5t per set of 4 or enough U-bolts to suit a single axle.
The max rating of 60mm Round axles is 3t with a u-bolt rating @ 1.5t.
Furthermore, we tested these u bolts during manufacture and batch tests until destruction.
Destruction loads exceed 17,000kg for 1/2 inch galvanised u bolts.
The max rating of 750kg axles is 750kg with ubolt rating @ 1500kg.
Further, vibration fatigue can loosen u-bolts if not re-tightened after 300 km.
Excellent article on vibration fatigue here.
Bare Galvanised U-Bolts with Nylocks and Washers
- 39mm Round Galvanised U-Bolts
- 40mm Square Galvanised U-Bolt
- 45mm Round Galvanised U-Bolt
- 45mm Square Galvanised U-Bolts
- 50mm Round Galvanised U-Bolts
- 50mm Square Galvanised U-Bolts
- 56mm Square Galvanised Chassis U-Bolt
- 65mm Round Galvanised U-Bolts
- 65mm Square Galvanised U-Bolt (165mm)
- 75mm Round Galvanised U-Bolts
- 75mm Square Galvanised U-Bolts
- 80mm Square Galvansied U-Bolt (120mm)
- 100mm Square Galvanised U-Bolts
- 125mm Square Galvanised U-Bolt (100mm)
Galvanised u bolt clamp kits are listed below
Additional information
| Weight | 0.75 kg |
|---|---|
| Dimensions | 15 × 8 × 1 cm |
| Select U-Bolt Length | 112mm, 125mm, 137mm, 162mm, 187mm |
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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