8931 Dunbier M12 Galvanised Flat Washer | Marine Trailer Part

🔧 Product Description

Dunbier Galvanised Flat Washer M12 - Part Number: 8931

A M12 flat washer used in Dunbier trailer hardware to spread clamping load, protect the component surface or provide the locking action required by the original joint.

⚙️ Key Features

• M12 nominal fastener size

• flat washer design

• galvanised steel finish

• Application: M12 trailer bolts and bracket joints

• Replacement service component

📏 Specifications

• Nominal size: M12

• Washer type: flat washer

• Finish/material: galvanised steel

• Inside diameter, outside diameter and thickness must match the original application

🔄 Cross Reference & Related Parts

• Dunbier: 8931

• A generic equivalent must match inside diameter, outside diameter, thickness, hardness and finish

• Do not replace a hardened axle or structural washer with a thin general-purpose washer

🚤 Trailer Compatibility & Application

• Suitable for M12 trailer bolts and bracket joints

• The washer must sit flat and fully support the nut or bolt head

• Use only with the matching bolt diameter and joint design

🔌 Function

Distributes fastener load, protects the clamped surface and performs the specified spacing or locking role.

Common signs of wear or replacement:

• Washer is dished, cracked, deeply grooved or worn thin

• Hole is elongated

• Corrosion has reduced the bearing area

• Shakeproof teeth or spring tension are flattened

• Washer no longer sits flat against the component

🛠️ Installation & Safety

• Install on a clean flat surface

• Orient toothed or shakeproof washers as required by the original joint

• Replace spring and shakeproof washers that have lost tension

• Use the correct hardened washer under high-load axle and structural nuts

• Torque the associated fastener to specification

📦 Condition

• Brand new Dunbier Marine Products trailer component

• Supplied as one replacement washer

• Supplied in original or equivalent packaging