H3323G Mackay 1014 Dunbier Coupling 70mm, 4500kg | Marine Trailer Part
H3323G Mackay 1014 Dunbier Coupling 70mm, 4500kg | Marine Trailer Part
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🔧 Product Description
Genuine Mackay Marine Trailer Products Heavy-Duty 70mm Trailer Coupling – Part Number: H3323G
A heavy-duty painted trailer coupling for trailers requiring a 70mm tow-ball connection and a coupling rating up to 4,500kg. This listing is for the coupling body only; the matching 70mm tow ball is supplied separately.
⚙️ Key Features
- Heavy-duty coupling rated to 4,500kg
- Designed for 70mm trailer tow balls
- Robust fabricated body for high-capacity trailer applications
- Adjustable latching mechanism
- Suitable for heavy marine-trailer drawbars when correctly engineered
📏 Specifications
- Maximum coupling rating: 4,500kg
- Tow-ball size: 70mm
- Finish: Painted
- Tow ball: Not included
- Mounting structure and hardware must be engineered for the trailer ATM
🔄 Cross Reference & Related Parts
- Mackay reference: H3323G
- Matching Dunbier/Mackay 70mm tow ball: 1045 / H3356
- Related earlier complete assembly reference: Dunbier 1015 where catalogued
🚤 Compatibility & Application
- Heavy boat trailers and commercial trailers engineered around a 70mm tow-ball coupling
- Vehicle towbar, 70mm ball, coupling, safety chains and trailer chassis must each carry adequate ratings
- Installation and certification requirements may differ for trailers above 4,500kg ATM
🔌 Function
Provides the primary articulated connection between a heavy trailer drawbar and the vehicle’s 70mm tow ball.
⚠️ Common Signs of Failure
- Latch does not close fully around the ball
- Visible cracking or deformation in the coupling body
- Excessive ball movement after adjustment
- Worn trigger, pivot or retaining components
- Damaged mounting holes or severe corrosion
📦 Condition
- Genuine Mackay Marine Trailer Products part
- Brand new
- Supplied in original or equivalent packaging
Shipping & Delivery
Shipping & Delivery
Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.
Returns & Warranty
Returns & Warranty
14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in new, unused condition for a refund or exchange. Manufacturer warranties apply to new parts. Full details in our Refunds & Returns policy.
Not sure this fits?
Not sure this fits?
Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.
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