CM001 The Marriage Saver Reversing Guide.

Caravan & trailer Reversing Guide

The Couplemate Caravan Reversing Guide (Marriage Saver®) makes hitching up your caravan, boat or camper easier than ever! Reversing cameras are great, but they do not stop accidents as efficiently as this trailer guide.

Australian Made and Owned.

COUPLEMATE IS A PROUD MEMBER OF THE AUSTRALIAN MADE PROGRAM.

We support local suppliers and help bring business back to Australian shores. There is strong demand for Australian Made caravan and trailer parts across the market.

The facts are simple; Australian Made goods create employment in Australia.

Latest Post
5 Things to Know: Mounting Springs Above Your Axle

5 Things to Know: Mounting Springs Above Your Axle

Traditional trailers, caravans, and campers usually have springs mounted below the axle (often called "overslung" axles). However, some trailers in Australia are supplied with springs on top of the axle by default. For example, if you own a Jayco Off-Road caravan or...

read more

U-Bolts & Kits

Showing 1–12 of 27 results

  • 125mm x 100mm u-bolt clamp kit

    100mm ElectroGal U-bolt Clamp Kit

    $15.50$20.00
    Options
  • 100mm Galvanised U Bolt

    100mm Galvanised U Bolts

    $9.50$16.00
    Options
  • 125mm Galvanised U Bolt

    $15.00
    Add to cart
  • 16mm square u-bolt

    16mm ElectroGal U-Bolt

    $9.90$19.50
    Options
  • 16mm Heavy Duty ElectroGal u-bolt

    50mm Square 16mm U-Bolt Kit

    $94.25
    Add to cart
  • 16mm Heavy Duty ElectroGal u-bolt

    45mm x 16mm Square U-Bolt Kit

    $84.25
    Add to cart
  • 65mm Round x 16mm U-Bolt Kit

    65mm Round x 16mm ElectroGal U-Bolt Kit

    $130.00
    Add to cart
  • 50mm round clamp kit 6 inch

    50mm Round Galvanised U-bolt Clamp Kit

    $13.20$17.50
    Options
  • 45mm Round Galvanised UBolt

    75mm Round Galvanised U-Bolt

    $15.00
    Add to cart
  • 45mm Round Galvanised UBolt

    65mm Round Galvanised U-Bolt

    $11.00$15.00
    Options
  • 50mm Square Galvanised U Bolts

    65mm x 165mm Square Galvanised U-Bolt

    $11.50
    Add to cart
  • 75mm ElectroGal U-Bolt

    75mm ElectroGal U-Bolt Clamp Kit

    $13.50$16.00
    Options

Square Axle U-bolt Fasteners for Caravans, Campers and Boat Trailers
Square axle U-bolt fasteners are rated at 1500kg single axle trailers, although our U-bolts are tested to destruction which occurs at 17,000kg.

The smaller rating allows for several factors, including shock-loading events.

U bolts clamp axles used for trailers, caravans, and campers.
How to measure axle U-Bolts
Significantly, to prevent clamp failure, tighten u-bolts after 300 kilometres.

Gal square U Bolts are manufactured from mild steel and stretch after the initial tightening.

Once the fishplate begins to bend during tightening, the u-bolts are tight.

Finally, expect to gain 1/4 or 1/2 a turn when retightening after 300 kilometres.

Why U-bolts may be the Major Cause of Accidents.

Stretching U-Bolts cause Caravanning Problems.
Couplemate U-Bolts

A

Round U-Bolts
A

Square U-Bolts
B

Width
C

Height
Part Number

1 ½ inch (39mm)

½ inch (12.7mm)
4 inch (100mm)
U39R4GH

1 ½ inch (39mm)

½ inch (12.7mm)
4½ inch (112mm)
U39R45GH

1 ½ inch (39mm)

½ inch (12.7mm)
5 inch (125mm)
U39R5GH

1 ½ inch (39mm)

½ inch (12.7mm)
5½ inch (137mm)
U39R55GH

1 ¾ inch (45mm)

½ inch (12.7mm)
4 inch (100mm)
U45R4GH

1 ¾ inch (45mm)

½ inch (12.7mm)
4½ inch (112mm)
U45R45GH

1 ¾ inch (45mm)

½ inch (12.7mm)
5 inch (125mm)
U45R5GH

1 ¾ inch (45mm)

½ inch (12.7mm)
5½ inch (137mm)
U45R55GH

1 ¾ inch (45mm)

½ inch (12.7mm)
6 inch (150mm)
U45R6GH

1 ¾ inch (45mm)

½ inch (12.7mm)
6½ inch(162mm)
U45R65GH

2 inch (50mm)

½ inch (12.7mm)
4 inch (100mm)
U50R4GH

2 inch (50mm)

½ inch (12.7mm)
4½ inch (112mm)
U50R45GH

2 inch (50mm)

½ inch (12.7mm)
5 inch (125mm)
U50R5GH

2 inch (50mm)

½ inch (12.7mm)
5½ inch (137mm)
U50R55GH

2 inch (50mm)

½ inch (12.7mm)
6 inch (150mm)
U50R6GH

2 inch (50mm)

½ inch (12.7mm)
6½ inch(162mm)
U50R65GH

2 inch (50mm)

½ inch (12.7mm)
7 inch (175mm)
U50R7GH

1 ½ inch (40mm)
½ inch (12.7mm)
4 inch (100mm)
U40S4GH

1 ½ inch (40mm)
½ inch (12.7mm)
4½ inch (112mm)
U40S45GH

1 ½ inch (40mm)
½ inch (12.7mm)
5 inch (125mm)
U40S5GH

1 ½ inch (40mm)
½ inch (12.7mm)
5½ inch (137mm)
U40S55GH

1 ½ inch (40mm)
½ inch (12.7mm)
6 inch (150mm)
U40S6GH

1 ¾ inch (45mm)
½ inch (12.7mm)
4 inch (100mm)
U45S4GH

1 ¾ inch (45mm)
½ inch (12.7mm)
4½ inch (112mm)
U45S45GH

1 ¾ inch (45mm)
½ inch (12.7mm)
5 inch (125mm)
U45S5GH

1 ¾ inch (45mm)
½ inch (12.7mm)
5½ inch (137mm)
U45S55GH

1 ¾ inch (45mm)
½ inch (12.7mm)
6 inch (150mm)
U45S6GH

1 ¾ inch (45mm)
½ inch (12.7mm)
6½ inch(165mm)
U45S65GH

1 ¾ inch (45mm)
½ inch (12.7mm)
7 inch (175mm)
U45S7GH

2 inch (50mm)
½ inch (12.7mm)
3 inch (75mm)
U50S3GH

2 inch (50mm)
½ inch (12.7mm)
4 inch (100mm)
U50S4GH

2 inch (50mm)
½ inch (12.7mm)
4½ inch (112mm)
U50S45GH

2 inch (50mm)
½ inch (12.7mm)
5 inch (125mm)
U50S5GH

2 inch (50mm)
½ inch (12.7mm)
5½ inch (137mm)
U50S55GH

2 inch (50mm)
½ inch (12.7mm)
6 inch (150mm)
U50S6GH

2 inch (50mm)
½ inch (12.7mm)
6½ inch (165mm)
U50S65GH

2 inch (50mm)
½ inch (12.7mm)
7 inch (175mm)
U50S7GH

2 inch (50mm)
½ inch (12.7mm)
8 inch (200mm)
U50S8GH

2 inch (50mm)
½ inch (12.7mm)
10 inch (250mm)
U50S10GH

2 ¼ inch (56mm)
½ inch (12.7mm)
4½ inch (112mm)
U56S45GH

2 ¼ inch (56mm)
½ inch (12.7mm)
5 inch (125mm)
U56S5GH

2 ¼ inch (56mm)
½ inch (12.7mm)
5½ inch (137mm)
U56S55GH

2 ¼ inch (56mm)
½ inch (12.7mm)
6½ inch (165mm)
U56S65GH

3 inch (75mm)
½ inch (12.7mm)
3 inch (75mm)
U75S75GH

3 inch (75mm)
½ inch (12.7mm)
4 inch (100mm)
U75S100GH

3 inch (75mm)
½ inch (12.7mm)
5 inch (125mm)
U75S125GH

3 inch (75mm)
½ inch (12.7mm)
6 inch (150mm)
U75S150GH

3 inch (75mm)
½ inch (12.7mm)
7 inch (175mm)
U75S175GH

3 ¼ inch (82mm)
½ inch (12.7mm)
4 ¾ inch (120mm)
U80S120GH

4 inch (100mm)
½ inch (12.7mm)
3 inch (75mm)
U100S75GH

4 inch (100mm)
½ inch (12.7mm)
4 inch (100mm)
U100S100GH

4 inch (100mm)
½ inch (12.7mm)
5 inch (125mm)
U100S125GH

4 inch (100mm)
½ inch (12.7mm)
8 inch (200mm)
U100S200GH

1 ¾ inch (45mm)

⅝ inch (16mm)
6 inch (150mm)
CM600GH

2 inch (50mm)

⅝ inch (16mm)
6 inch (150mm)
CM602GH

2 ⅓ inch (60mm)

⅝ inch (16mm)
7 inch (175mm)
CM604GH

1 ¾ inch (45mm)
⅝ inch (16mm)
6 inch (150mm)
CM601GH

2 inch (50mm)
⅝ inch (16mm)
7 inch (175mm)
CM603-7GH

Australian Made and Owned.

COUPLEMATE IS A PROUD MEMBER OF THE AUSTRALIAN MADE PROGRAM.

We support local suppliers and help bring business back to Australian shores. There is strong demand for Australian Made caravan and trailer parts across the market.

The facts are simple; Australian Made goods create employment in Australia.

You may be interested in …
5 Things to Know: Mounting Springs Above Your Axle

5 Things to Know: Mounting Springs Above Your Axle

Traditional trailers, caravans, and campers usually have springs mounted below the axle (often called "overslung" axles). However, some trailers in Australia are supplied with springs on top of the axle by default. For example, if you own a Jayco Off-Road caravan or...

read more

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Call 07 3348 3822

Available Monday to Friday, 8am to 5pm.