Trigg Bros Pty Ltd

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Founded in 1925, Trigg Bros Pty Ltd is a family owned and operated business, located in Adelaide, South Australia, specialising in the repetition manufacture of small to medium sized castings in grey iron, ductile iron and alloyed irons (wear resistant).

Our company is certified to ISO9001:2008 and our manufacturing system is centred around automated moulding and induction melting.


Casting Examples

Trailer Couplings & Components

Trigg Bros Pty Ltd is committed to maintaining a high quality range of trailer couplings and components backed by excellence in customer service.

The benefits of using a Trigg Bros Pty Ltd quality trailer coupling include -

  • AS 4177.3 compliant.
  • 100% Australian manufactured and competitively priced.
  • Readily available throughout Australia via our distributors.
  • Spares and backup service always available.
  • Quick turnaround from order placement to delivery.
  • Casting quality to ISO9001:2008.



  • 50mm Starnut
  • 50mm Plunger
  • 50mm Override Brake
  • 50mm Electric Brake
  • 75mm Ring
  • Off-road Polyblock
  • Braking


  • Disc Brake Calipers
  • Hubs & Disc Rotors
  • Brake Drums
  • Rocker Arms & Shackles