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

U-Bolts & Kits

Showing 13–24 of 27 results

  • Trailer U bolt Kit | Galvanised

    Galvanised 1/2-inch U-Bolt Kits

    $39.00 - $57.50
    Options
  • 710mm Shackle Galvanised Spring

    45mm Galvanised Shackle Spring – 710mm

    $114.40 - $138.60
    Options
  • 80mm Square Galvanised U Bolt

    80mm Square Galvanised Chassis U-Bolt

    $11.00
    Add to cart
  • 56mm Square Galvanised Chassis U-Bolt

    $10.00 - $12.00
    Options
  • 45mm Round Galvanised UBolt

    50mm Round Galvanised U-Bolt

    $9.50 - $15.00
    Options
  • Couplemate M16 U-Bolt Kit Heavy Duty 60mm Round

    60mm Round Heavy Duty U-Bolt Kit

    $117.00
    Add to cart
  • 50mm Square Galvanised Clamp kit

    50mm Square Galvanised U-bolt Clamp Kit

    $12.75 - $17.25
    Options
  • 50 x 150mm U-bolt clamp kit

    56mm Galvanised U Bolt Clamp Kit

    $13.50 - $16.50
    Options
  • 80mm Wide x 120mm gal clamp kit.

    80mm x 120mm Galvanised Clamp Kit

    $15.00
    Add to cart
  • 75mm galvanised U-Bolts

    75mm Galvanised Jockey Wheel U-Bolt

    $6.50 - $12.00
    Options
  • 175mm x 50mm square galvanised U-bolt

    50mm Square Galvanised U Bolt

    $7.50 - $15.50
    Options
  • 45mm Round Galvanised UBolt

    45mm Round Galvanised U-Bolt

    $8.50 - $13.00
    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.

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