Coupling Tc40 Suit 1 7/8" – Heavy-Duty Snap Lock Trailer Coupling

Designed by Trojan for demanding New Zealand conditions, the Tc40 1 7/8" Snap Lock Trailer Coupling delivers fast, secure hitching with peace of mind. A galvanized finish shields the body from harsh outdoor elements, while an integrated anti-rattle screw minimizes movement and cabin noise during transit. This unit is engineered to fit trailers that use a 1 7/8" hitch ball and ships with a 3/4" Master Cylinder for straightforward installation and compatibility with common brake or hydraulic systems.

Why this Tc40 coupling stands out

• Snap lock, tool-free hitching: Quick, reliable engagement that stays locked even on rugged roads and during vibration, reducing hitching time and operator effort.
• Integrated anti-rattle design: An anti-rattle screw eliminates play and unwanted noise, delivering a quieter, smoother towing experience.
• Galvanised steel body: Superior corrosion resistance for coastal, garden, and rural environments, extending the life of your trailer hardware.
• Included 3/4" Master Cylinder: Simplifies installation and connects to compatible brake or hydraulic systems as needed, making setup faster and more versatile.
• NZ mounting compatibility: Built around one of New Zealand’s most common bolt patterns, making replacements and upgrades straightforward with four 12 mm high-tensile bolts recommended.
• Solid load rating: Rated to a maximum of 2500 kg, ideal for mid-weight trailers, caravans, boat trailers, and utility setups within this range.
• Compliance and safety: Australian Standard AS4177.3 (1994) compliance helps ensure industry benchmarks for safety and performance are met.

Ideal uses and real-world scenarios

Perfect for mid-range trailers where dependable, quick-connect hitching matters. Use it on boat trailers that frequently hitch and unhitch in variable outdoor conditions, caravans on coastal roads, or utility trailers that need a robust, maintenance-friendly connection. The snap lock mechanism makes routine hitching fast in the field, while the anti-rattle screw keeps vibration-induced noise to a minimum during long trips.

Installation tips and ongoing care

For optimal performance and safety, mount the Tc40 using four 12 mm high-tensile bolts aligned with NZ’s common mounting pattern. Center the pattern, tighten to the manufacturer-recommended torque for your bolts, and verify the snap mechanism engages fully before towing. Regularly inspect the anti-rattle screw and Master Cylinder connections, re-securing components if you notice looseness or wear.

Technical specifications at a glance

• 1 7/8"
• Finish: Galvanised steel
• Locking: Snap lock with anti-rattle screw
• Master Cylinder: 3/4” (included)
• Max load: 2500 kg
• Mounting pattern: NZ common bolt pattern (four 12 mm high-tensile bolts recommended)
• Compliance: AS4177.3 (1994)

Why choose Trojan for trailer couplings

Trojan brings a heritage of rugged, purpose-built trailer hardware designed to perform reliably in challenging environments. The Tc40 1 7/8" Snap Lock Coupling embodies engineering that prioritizes quick hitching, secure latching, and long-term durability—backed by a design that anticipates real-world use, from coastal spray to muddy ramps. When you need a dependable, easy-to-service coupling that aligns with industry standards, this Trojan unit is built to work as hard as you do.