Round Axle U-bolts 1/2" (5)
Square Axle U-bolts 1/2" (9)
Heavy Duty U-bolts 16mm (1)
U-Bolt Kit (2)
U-bolt Clamp Kits 1/2" (5)
U Bolt Galvanised Kits and Clamp Kits
Trailer U bolts kits provide a higher degree of strength when the steel is rolled; they include galvanised nylock nuts that are less prone to breakage than their conventional counterparts.
Rolled threads, extruded by dies, are stronger than cut threads, made on a lathe or with a hand die, because their grain flows in more than one direction, following the fastener’s contour. So you shouldn’t re-cut the threads of a roll–threaded bolt.
All Couplemate ElectroGal® U-bolt is de-stressed in a new process—that happens after ElectroGal®—to remove the stresses from manufacture. These U-bolts are then batch tested to destruction.
Why are our U bolts kits tested, you ask?
The answer is that weak points created when bending steel. If this stress pressure remains, shock loading from bad roads can cause stress fractures and breakages.
The humble U-bolt on your caravan can cause you unbelievable grief. At Couplemate, we decided a long time ago to manufacture U-bolts when popular products kept breaking.
Available hanger kits
- 45mm Slipper Single Axle
- 45mm slipper Tandem
- 60mm Slipper Single Axle
- 60mm Slipper Tandem Axle
- 45mm Eye to Eye – Single
- 45mm Eye to Eye – Tandem
- 60mm Eye to Eye – Single
- 60mm Eye to Eye – Tandem.
A standard zinc square U-bolt broke due to a stress fracture on the bend. Immediately, we realised that Couplemate needed to make a better Caravan U bolt.
We designed an ElectroGal® U bolt that had the thread rolled—as opposed to cut. Then, we made the length of the thread 60mm—instead of the standard 50mm—because we were always running out of thread when tightening the nuts.
Finally, we decided that galvanised nylock nuts were the better way to lock U bolts into position, rather than the two locking nuts which always seemed to rust.
Note: When replacing U bolts, make sure you also replace your old nylock nuts. These are a one-use-only nut.
Here are a few related u-bolt articles
- Axle under Springs to raise Caravan Height
- Wrong hanger location cause Spring Problems
- Caravan Wheel Alignment
ElectroGal® 1/2 inch U-bolts: breaking capacity is 17,000kg—we recommend use on axles rated up to 1500kg
ElectroGal® 5/8 inch U-bolts: breaking ability is 23,000kg—we recommend application on axles rated up to 2500kg
Finally, U bolt Clamp kits are also available for 50mm, 56mm and 80mm clamping.