# 2020 Dunbier A1682G Mackay Standard Spring Fish Plate (Galvanised) | Marine Trailer Part

🔧 Product Description

  

Dunbier Standard Galvanised Spring Fish Plate - Part Number: 2020

  

A galvanised lower spring plate for Dunbier 45mm-wide slipper-spring suspension. It spans beneath the spring pack and provides the mounting holes for 42mm-wide U-bolts, clamping the axle, saddle and spring together.

  

⚙️ Key Features

  

• Galvanised marine trailer finish

• Suits 45mm-wide slipper springs

• Designed for approximately 42mm-wide U-bolts

• Four-hole axle-clamping plate

• Replacement for bent or corroded original plates

  

📏 Specifications

  

• Spring width application: 45mm

• U-bolt inside-width application: Approximately 42mm

• Mackay reference: A1682G

• Plate hole spacing must match the U-bolts

  

🔄 Cross Reference & Related Parts

  

• Dunbier: 2020

• Mackay: A1682G

• U-bolts: Dunbier 2100B or 2100S where dimensions match

• Large load-share plates: Dunbier 2022 and 2023

  

🚤 Trailer Compatibility & Application

  

• Suits standard Dunbier 45mm slipper spring and compatible axle assemblies

• Confirm axle beam and U-bolt dimensions

• Not intended for 60mm load-share springs

  

🔌 Function

  

Distributes U-bolt clamping force beneath the spring and retains the axle securely on the suspension.

  

Common signs of wear or replacement:

  

• Plate is bent, cracked or heavily corroded

• U-bolt holes are elongated

• Plate has cut into the spring

• Axle movement or loose U-bolts

• Clamping surfaces are no longer flat

  

🛠️ Installation & Safety

  

• Replace U-bolts and nuts with the plate

• Seat the plate squarely beneath the spring

• Tighten U-bolts evenly in a cross pattern

• Confirm spring centre-bolt and axle-saddle engagement

• Recheck torque after initial travel

  

📦 Condition

  

• Brand new Dunbier Marine Products trailer component

• Supplied as one galvanised standard spring fish plate

• Supplied in original or equivalent packaging

## Details

- **Price:** 6.0 AUD
- **Vendor:** Dunbier
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 6.00 AUD | In stock |

## Images

- 2020 Dunbier A1682G Mackay Standard Spring Fish Plate (Galvanised) | Marine Trailer Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/2020-dunbier-standard-spring-fish-plate-galvanized-mackay-a1682g)
> Updated: 2026-08-11