56mm Square Galvanised Chassis U-Bolt
$10.00 – $12.00
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 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-tighten approx 300 km after installation due to steel’s ability to stretch a little 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.
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 |
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