The Trojan duofit spring operated couplings are the only couplings that comply fully with the New Zealand standard for towball couplings NZS5232:1993 in all respects. They are designed to suit 50mm and 1’’ 7/8 tow balls and is rated to maximum GVM of 2500kg, are made from high grade cast iron and coated significantly with corrosion protection for long term maintenance free use. A large range of spare parts is also available.
| Bolt Size | G 8.8 | G 10.9 |
|---|---|---|
| M10 |
45ft/lb 60Nm | 60ft/lb 80Nm |
| M12 | 75ft/lb 100Nm | 90ft/lb 120Nm |