# 9728 Dunbier Adjustable Rail Mount Clamp Bracket | Marine Trailer Part

🔧 Product Description

  

Dunbier Adjustable Rail-Mount Clamp Bracket - Part Number: 9728

  

A galvanised adjustable clamp bracket for positioning compatible Dunbier trailer rails and hull-support members on a cross member. The slotted or clamping arrangement allows the rail position to be set before the fasteners are tightened.

  

⚙️ Key Features

  

• Adjustable galvanised rail-mount bracket

• Bolt-on clamp configuration

• Allows lateral or height positioning depending on the complete mount system

• Suitable for trailer rail and hull-support adjustments

• Reusable when structurally undamaged

  

📏 Specifications

  

• Application: Dunbier adjustable rail mounting

• Cross-member size, rail profile and bolt pattern must match the installed system

• Associated bolts, U-bolts or plastic blocks are supplied separately unless included in the package

  

🔄 Cross Reference & Related Parts

  

• Dunbier: 9728

• Standard adjustable rail-mount kit: Dunbier 9731

• Loader-Pro rail-mount set: Dunbier 9732

• Loader-Pro upright brackets: Dunbier 9721 and 9727

  

🚤 Trailer Compatibility & Application

  

• Suitable for compatible Dunbier rail, bunk and Loader-Pro support systems

• The clamp must seat fully on the trailer cross member

• Do not use on a cross member whose dimensions exceed the clamp range

  

🔌 Function

  

Clamps and positions the trailer support rail while allowing alignment to the hull before final tightening.

  

Common signs of wear or replacement:

  

• Bracket is bent, cracked or heavily corroded

• Slots or bolt holes are elongated

• Clamp slides under boat load

• Cross member is crushed or distorted

• Rail cannot be retained at the selected position

  

🛠️ Installation & Safety

  

• Support the boat and rail before loosening the clamp

• Clean all clamping surfaces

• Tighten hardware evenly

• Do not crush thin-wall cross-member tube

• Recheck rail alignment and fastener torque after initial use

  

📦 Condition

  

• Brand new Dunbier Marine Products trailer component

• Supplied as one adjustable rail-mount clamp bracket

• Supplied in original or equivalent packaging

## Details

- **Price:** 59.5 AUD
- **Vendor:** Dunbier
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 59.50 AUD | In stock |

## Images

- 9728 Dunbier Adjustable Rail Mount Clamp Bracket | Marine Trailer Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/9728-adjustable-rail-mount-clamp-bracket)
> Updated: 2026-08-05