65mm Round Galvanised UBolt Rolled threads with gal flat washer + gal nylock. Thread length is 50mm.
It is crucial you retighten ubolts approx 200lkms after installation due to steels ability to stretch a little under load.
Unmaintained u-bolts will loosen then break. U-bolts are a major cause of roads accidents.
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 ubolts are derated to 375kg each or 1500kg per set of 4 or enough ubolts to suit a single axle.
The max rating of 60mm Round axles is 3000kg with a ubolt rating @ 1500kg for 4 ubolts.