# 2110S Dunbier U-Bolt Square 67 x 90 x 12mm Pair Pack | Marine Trailer Part

🔧 Product Description

  

Dunbier Square U-Bolts 67 × 90 × 12mm - Pair Pack - Part Number: 2110S

  

A galvanised square trailer U-bolt with an internal width of approximately 67mm, an inside leg length of approximately 90mm and a 12mm rod diameter. It is used with the matching fish plate and nuts to clamp an axle, chassis member or suspension component.

  

⚙️ Key Features

  

• Square-form galvanised U-bolt

• Internal width approximately 67mm

• Inside leg length approximately 90mm

• Rod diameter 12mm

• Supplied as 2 u-bolts

  

📏 Specifications

  

• Dimension A - inside width: 67mm

• Dimension B - inside length: 90mm

• Rod diameter: 12mm

• Shape: Square

• Package: Display pair pack

  

🔄 Cross Reference & Related Parts

  

• Dunbier: 2110S

• Matching fish plate and axle/chassis dimensions must be confirmed

• Dunbier current catalogue U-bolt dimensions are listed by inside width × inside length × rod diameter

• Pair-pack references use an S suffix; bulk/single references commonly use a B suffix

  

🚤 Trailer Compatibility & Application

  

• Suitable only where the U-bolt fits fully around the intended square beam without spreading

• Threaded length must allow the fish plate, washers and nuts to engage correctly

• Do not substitute a different rod diameter or bend radius without checking the suspension design

  

🔌 Function

  

Clamps the axle or structural member securely against the spring and fish plate or associated trailer bracket.

  

Common signs of wear or replacement:

  

• Threads are stretched, stripped or heavily corroded

• U-bolt legs are bent or spread

• Nuts repeatedly lose torque

• Rust has reduced rod diameter

• Axle or bracket has moved under the clamp

  

🛠️ Installation & Safety

  

• Do not reuse U-bolts that have been fully torqued, stretched or corroded

• Tighten both legs progressively and evenly

• Use matching nuts, washers and fish plate

• Confirm adequate thread engagement without bottoming the nuts

• Re-torque after initial loaded travel

  

📦 Condition

  

• Brand new Dunbier Marine Products trailer component

• Supplied as one pair pack containing two galvanised square U-bolts

• Supplied in original or equivalent packaging

## Details

- **Price:** 19.8 AUD
- **Vendor:** Dunbier
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 19.80 AUD | In stock |

## Images

- 2110S Dunbier U-Bolt Square 67 x 90 x 12mm Pair Pack | Marine Trailer Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/2110s-dunbier-ubolt-sq-67x90x12mm-packed-in-pairs)
> Updated: 2026-08-03