# 1061 Dunbier H3354 Mackay 50mm Chrome Trailer Tow Ball | Marine Trailer Part

🔧 Product Description

  

Dunbier Chrome Trailer Tow Ball 50mm - 3500kg - Part Number: 1061

  

A chrome-plated 50mm tow ball for standard and heavy-duty Dunbier trailer couplings. Mackay H3354 is catalogued with a 3500kg capacity, subject to the permanent marking, towbar rating and correct installation.

  

⚙️ Key Features

  

• Standard Australian 50mm ball diameter

• Chrome-plated wear surface

• Heavy-duty catalogue rating

• Suitable for fixed and override 50mm couplings

• Includes mounting nut and washer as supplied

  

📏 Specifications

  

• Ball diameter: 50mm

• Mackay catalogue rating: 3500kg

• Finish: Chrome plated

• Shank size must match the towbar tongue

  

🔄 Cross Reference & Related Parts

  

• Dunbier: 1061

• Mackay: H3354

• Compatible coupling families: Dunbier 1000, 1010, 1030, 1032 and 1041 subject to rating

• Comparable replacement: ADR/AS-compliant 50mm tow ball with matching shank and marked capacity

  

🚤 Trailer Compatibility & Application

  

• Suitable for vehicle towbars with a compatible rated tongue

• The ball rating must be equal to or greater than the trailer ATM

• Not compatible with 70mm heavy-trailer couplings

  

🔌 Function

  

Forms the spherical pivot captured by the trailer coupling, allowing steering and vertical articulation.

  

Common signs of wear or replacement:

  

• Flat spots, grooves or undersize ball diameter

• Loose mounting nut

• Damaged thread or stretched shank

• Severe corrosion below damaged chrome

• Unclear or missing rating mark

  

🛠️ Installation & Safety

  

• Install through a correctly sized rated towbar tongue

• Torque the nut to the ball manufacturer's specification

• Use the supplied washer and approved locking method

• Check coupling fit after installation

• Inspect periodically and replace if the ball surface is materially worn

  

📦 Condition

  

• Brand new Dunbier Marine Products trailer component

• Supplied as one 50mm chrome tow ball with mounting hardware

• Supplied in original or equivalent packaging

## Details

- **Price:** 15.3 AUD
- **Vendor:** Dunbier
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 15.30 AUD | In stock |

## Images

- 1061 Dunbier H3354 Mackay 50mm Chrome Trailer Tow Ball | Marine Trailer Part
- 1061 Dunbier H3354 Mackay 50mm Chrome Trailer Tow Ball | Marine Trailer Part
- 1061 Dunbier H3354 Mackay 50mm Chrome Trailer Tow Ball | Marine Trailer Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/1061-dunbier-50mm-chrome-trailer-towball-mackay-h3354)
> Updated: 2026-08-03