# 1010 Dunbier H3330 Mackay 2-Hole Standard Coupling 2000kg | Marine Trailer Part

🔧 Product Description

  

Dunbier Standard Two-Hole Trailer Coupling 50mm - 2000kg - Part Number: 1010

  

A galvanised standard trailer coupling for 50mm tow balls and trailers up to the coupling's marked 2000kg rating. The two-hole mounting base is commonly used on light and medium boat-trailer drawbars, while the adjustable ball socket allows wear clearance to be set correctly.

  

⚙️ Key Features

  

• Standard 50mm ball coupling

• Two-hole drawbar mounting pattern

• Galvanised finish

• Adjustable ball-head clearance

• Positive trigger locking mechanism

  

📏 Specifications

  

• Coupling rating: 2000kg

• Tow-ball size: 50mm

• Mounting pattern: Two-hole

• Finish: Galvanised

• Tow ball and mounting hardware are not included unless stated

  

🔄 Cross Reference & Related Parts

  

• Dunbier: 1010

• Mackay: H3330

• Adjustment bolt: Dunbier 1011

• Trigger kit: Dunbier 1044C

• Tow ball: Dunbier 1061 / Mackay H3354

• Comparable category: AL-KO, Ark and Trojan two-hole 50mm couplings with matching rating and bolt centres

  

🚤 Trailer Compatibility & Application

  

• Suitable for unbraked trailers and trailers with independent braking systems where a fixed coupling is specified

• Check the trailer compliance plate and required coupling rating

• Mounting-hole spacing and drawbar width must match the existing installation

  

🔌 Function

  

Provides the primary mechanical connection between the trailer drawbar and the vehicle's 50mm tow ball.

  

Common signs of wear or replacement:

  

• Coupling rattles excessively on the tow ball

• Trigger or safety catch does not lock

• Ball socket is visibly worn or deformed

• Mounting holes are elongated

• Corrosion prevents smooth operation

  

🛠️ Installation & Safety

  

• Fit using correctly rated high-tensile bolts and locking nuts

• Adjust only enough to remove excessive ball clearance while preserving free articulation

• Verify positive latching by lifting the coupling after connection

• Connect the safety chain separately

• Do not exceed the lowest marked rating in the towing system

  

📦 Condition

  

• Brand new Dunbier Marine Products trailer component

• Supplied as one complete two-hole 50mm coupling

• Supplied in original or equivalent packaging

## Details

- **Price:** 51.3 AUD
- **Vendor:** Dunbier
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 51.30 AUD | In stock |

## Images

- 1010 Dunbier H3330 Mackay 2-Hole Standard Coupling 2000kg | Marine Trailer Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/1010-dunbier-2-hole-standard-coupling-2000kg-mackay-h3330)
> Updated: 2026-08-03