# 1622C Dunbier A1368 Mackay Axle Castle Nuts, Washers and Pins x 2 Clamshell Pack | Marine Trailer Part

🔧 Product Description

  

Dunbier Axle Castle-Nut, Washer and Split-Pin Service Kit - Pair - Part Number: 1622C

  

A clamshell-packaged wheel-bearing retaining hardware kit containing two castle nuts, two axle washers and two split pins. Mackay A1368 is commonly described as a pair of 3/4-inch axle nuts and split pins for standard 39mm round through 45mm square axle families.

  

⚙️ Key Features

  

• Services both sides of one axle

• Includes castle nuts, flat/thrust washers and split pins

• Zinc-finished hardware

• Suitable for routine hub and bearing service

• Retail clamshell package keeps the components together

  

📏 Specifications

  

• Quantity: 2 castle nuts

• Quantity: 2 axle washers

• Quantity: 2 split pins

• Common nut size: 3/4-inch axle thread family

• Application range: Selected 39mm round to 45mm square axles

  

🔄 Cross Reference & Related Parts

  

• Dunbier: 1622C

• Mackay: A1368

• Bearing and seal kits are sold separately

• Use the axle-specific nut and washer if the installed stub uses a different thread

  

🚤 Trailer Compatibility & Application

  

• Suitable for compatible Dunbier/Mackay standard axle stubs

• Not automatically suitable for heavy 2.2-tonne, AL-KO or Trojan axle threads

• Compare thread diameter and pitch before installation

  

🔌 Function

  

Retains the hub and bearing assembly on the axle stub while the castellations allow the nut to be locked with a split pin.

  

Common signs of wear or replacement:

  

• Nut thread or castellations are damaged

• Washer is grooved, dished or heat-discoloured

• Split pin has been reused, bent repeatedly or corroded

• Bearing adjustment cannot be retained

• Nut has loosened because the locking pin is missing

  

🛠️ Installation & Safety

  

• Always use a new split pin

• Adjust wheel bearings according to the hub and bearing manufacturer's procedure

• Do not overtighten tapered roller bearings

• Align the nearest castle-nut slot without backing off excessively

• Confirm the wheel turns freely with no excessive end float

  

📦 Condition

  

• Brand new Dunbier Marine Products trailer component

• Supplied as one clamshell kit for both sides of one axle

• Supplied in original or equivalent packaging

## Details

- **Price:** 7.65 AUD
- **Vendor:** Dunbier
- **Tags:** Dunbier Boat Trailers | Marine Trailer Parts & Accessories

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 7.65 AUD | In stock |

## Images

- 1622C Dunbier A1368 Mackay Axle Castle Nuts, Washers and Pins x 2 Clamshell Pack | Marine Trailer Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/1622c-dunbier-axle-castle-nuts-washers-pins-x-2-clam-shell-pack-mackay-a1368)
> Updated: 2026-08-03