1045 Dunbier H3356 Mackay 70mm Tow Ball, Suits 4500kg | Marine Trailer Part
1045 Dunbier H3356 Mackay 70mm Tow Ball, Suits 4500kg | Marine Trailer Part
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🔧 Product Description
Dunbier Chrome Trailer Tow Ball 70mm – 4500kg – Part Number: 1045
A heavy-duty chrome-plated 70mm tow ball designed to match the Dunbier 1014 and Mackay H3323G heavy trailer coupling. Current Mackay catalogue information rates H3356 at 4500kg, and the permanent marking on the supplied ball is the governing rating.
⚙️ Key Features
- 70mm heavy-trailer tow ball
- Chrome-plated finish
- Designed for the matching 70mm coupling
- High-capacity shank and nut arrangement
- Permanent rating marking should be visible on the component
📏 Specifications
- Ball diameter: 70mm
- Mackay catalogue rating: 4500kg
- Finish: Chrome plated
- Mounting-shank dimensions must match the tow-ball tongue
🔄 Cross Reference & Related Parts
- Dunbier: 1045
- Mackay: H3356
- Matching coupling: Dunbier 1014 / Mackay H3323G
- Comparable tow balls must match diameter, shank, mounting thickness and marked rating
🚤 Trailer Compatibility & Application
- Suitable for compatible heavy-trailer towbars and ball mounts
- The towbar, tongue, ball, coupling and vehicle ratings must all support the trailer ATM
- Not compatible with 50mm couplings
🔌 Function
Provides the spherical articulation point captured by the trailer's 70mm coupling.
⚠️ Common Signs of Failure
- Ball surface is heavily scored, flattened or undersize
- Shank or thread is stretched or damaged
- Mounting nut loosens
- Chrome plating is flaking with deep corrosion underneath
- Rating mark is unreadable
🛠️ Installation & Safety
- Install only in a tow-ball tongue approved for the shank and rating
- Tighten the mounting nut to the tow-ball manufacturer's specification
- Use the specified washer and locking method
- Do not lubricate the ball if the coupling manufacturer requires a dry friction interface
- Inspect after initial towing and periodically thereafter
📦 Condition
- Brand new Dunbier Marine Products trailer component
- Supplied as one 70mm chrome tow ball with supplied mounting hardware
- 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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