Rated Dee Shackle | Towbar

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(1 customer review)

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What You Need To Know about Rated Dee Shackle

To summarise, install rated dee shackles with a coloured pin and sidestep any compliance issues.

I did the video below years ago. Essentially, if you get pulled over by Police and they may ask you to prove your dee shackles are compatible with your safety chain.

If your dee shackles are not stamped to prove safety chain compatibility then there is a problem.


National legislation is currently under review to be released in 2018.

I had a few comments questioning the legality of rated safety shackles being a requirement under the law.

ADR 62/02 For trailers over 3.5 tonnes ‘ATM’, the safety chain must be made from steel of a minimum 800 MPa breaking stress, conform to the mechanical properties of Grade T chain as specified in AS 2321 – 2001 Short Link Chain for Lifting Purposes and must be of a size such that the minimum breaking load exceeds the ‘ATM’.

The last 6 words in this clause require Rated or Stamped Dee Shackles. You must be able to prove your chain complies with your rated ATM.

Still, have not seen a traffic ticket for non-rated shackles. I believe tickets are not being issued at the moment.

Offer: Send me a copy of your ticket for non-compliant dee shackles and I will pay it. Offer open to 1 ticket only.

How to calculate the correct size?

Rated dee shackles: How do I calculate the correct size? Click here

Rated dee shackles are not a requirement for caravans and trailers under 3.5t. Not required? Yes, there is a catch 22.

A dee shackle must be compatible with the safety chain, and the safety chain must carry a stamp of at least the same capacity as the rating every 4 links.

So there is the catch. How do you prove your Dee Shackle is COMPATIBLE? If the dee shackle has no stamp on it, you can prove nothing.

Stamped Dee Shackles

If your dee shackle has a stamp on it then you can prove it is rated the same as the safety chain. No stamp, no prove of compatibility with safety chain. Catch 22.

Trailers over 2.5t must have two safety chains; each chain must be of the same capacity or exceed the capacity of the ATM.

Australian Standards require safety chains on trailers over 3.5t to be connected to your trailer via safety chain holders or approved high tensile links. Dee shackles are not an approved device.

Dee Shackles are often copied, rarely tested. We asked our supplier for test certificates and to our surprise, we got test certificates. Listed below are the test certificates.

Test certificates can be viewed here.

Important safety chain note

The marking on the complying chain is repeated at intervals not exceeding 4 links. The characters on the links are at least 1.5 mm high for chains less than 8 mm link diameter, and not less than 2 mm high for chains 8 mm and above.

If your safety chain has no markings, it is permissible to cut it off at the welded link on the trailer.

Join a length of approved safety chain to your welded link with a hammerlock.

Technical Details

0.75t Rated Dee Shackle

  • Proof Load: 14.8kN
  • Break Load: 44.2kN
  • Elongation%: Not Applicable
  • Declaration of Compliance: AS2741
  • Certificate: V0234931-5
  • Max ATM Rating 3t

1t Rated Dee Shackle

  • Proof Load: 19.7kN
  • Break Load: 59.9kN
  • Elongation%: Not Applicable
  • Declaration of Compliance: AS2741
  • Certificate: V0234931-3
  • Max ATM Rating 4t

1.5t Rated Dee Shackle

    • Proof Load: 29.5kN
    • Break Load: 88.3kN
    • Elongation%: Not Applicable
    • Declaration of Compliance: AS2741
    • Certificate: V0234931-4
    • Max ATM Rating 6t

Trailers Under 2.5t

If your trailer does not exceed 2.5 tonnes ATM, it must have at least one safety chain complying with Australian Standard AS 4177.4-1994, or Australian Standard AS 4177.4-2004 ‘Caravan and light trailer towing components – Part 4.’

Trailers 2.5 To 3.5t

If your trailer is over 2.5 tonnes and under 3.5 tonnes ATM, it must have two safety chains of a designation of 3500 kg or greater for each chain.

Trailers Over 3.5t

According to Standard AS 4177.4-1994 and Australian Standard AS 4177.4–2004, trailers over 3.5 tonnes ATM must have two safety chains made from steel of a minimum 800 MPa breaking stress. The chain rating should also conform to the mechanical properties of Grade-T chain as specified in Australian Standard AS 2321-1979 ‘Short Link Chain for Lifting Purposes (non-calibrated), or Australian Standard AS 2321–2006 Short Link Chain for Lifting Purposes. Ultimately, you’ll need to go in for a chain sized such that the minimum breaking load exceeds the ATM.

Still confused, I hope not but if you are, there is another article here.

Couplemate sells only the best quality trailer and caravan spares throughout Australia—covering the Northern Territory, Western Australia, South Australia, Victoria, New South Wales, and Queensland. We also ship products via Australia Post Air to New Zealand.

Rated Dee Shackle | Towbar

Additional information

Dee Shackle

WLL 0.75t suit ATM 3t, WLL 1t suit ATM 4t, WLL1.5t suit ATM 6t, WLL 2t suit ATM 8t, 3.2t

1 review for Rated Dee Shackle | Towbar

  1. Rated 5 out of 5

    Steve Wotherspoon

    Editors Review: 1t Dee Shackles are great for use on ATM’s up to 4t.

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