U Bolts and Kits

  • 75mm ElectroGal U-Bolts

    75mm ElectroGal Jockey Wheel U-Bolt

    $9.00$14.00 inc GST
    Select options
  • 100mm Galvanised U Bolt

    100mm Galvanised U Bolts

    $9.50$20.00 inc GST
    Select options
  • 130mm Square ElectroGal u-bolts

    130mm Square ElectroGal U Bolt

    $14.00 inc GST
    Add to cart
  • 39mm Round U-bolt 112mm long

    39mm Round Galvanised U-Bolt Incl Gal Nylocks

    $9.00$11.00 inc GST
    Select options
  • 40mm Square u-bolt 5.5 inch long

    40mm Square Galvanised U Bolt

    $8.00$12.00 inc GST
    Select options
  • 45mm Round Galvanised UBolt

    45mm Round Galvanised U-Bolt

    $8.50$13.00 inc GST
    Select options
  • 50mm Square Galvanised U Bolts

    45mm Square Galvanised U-Bolt

    $10.00 inc GST
    Select options
  • 45mm Round Galvanised UBolt

    50mm Round Galvanised U-Bolt

    $9.50$15.00 inc GST
    Select options
  • 45mm Round Galvanised UBolt

    65mm Round Galvanised U-Bolt

    $11.00$15.00 inc GST
    Select options
  • 45mm Round Galvanised UBolt

    75mm Round Galvanised U-Bolt

    $15.00 inc GST
    Select options
  • 16mm Heavy Duty U bolt

    16mm Heavy Duty Galvanised U Bolts

    $6.50$22.50 inc GST
    Select options
  • 175mm x 50mm square galvanised U-bolt

    50mm Square Galvanised U Bolt

    $10.00$15.50 inc GST
    Select options

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.

U-Bolt Dimensions

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 rollthreaded bolt.

How U-bolts Cause Major Accidents.

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 are 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.

Measuring UboltsAvailable hanger kits

Stress Fractures

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. Use these nuts once only, do not reuse them.

Here are a few related u-bolt articles

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.