2981S Dunbier Roller Pin Suits 3 1/2" 16mm (Display Pack) | Marine Trailer Part

🔧 Product Description

Dunbier Display-Packed Roller Pin for 3-3.5" Rollers - Part Number: 2981S

A galvanised steel roller shaft sized for 3-inch/3.5-inch keel and bow rollers. The pin passes through the trailer bracket and roller bore, providing the axle on which the roller turns.

⚙️ Key Features

• Galvanised steel construction

• Nominal pin diameter: 16mm

• Approximate overall length: approximately 120mm

• Designed for 3-inch/3.5-inch keel and bow rollers

• Supply format: display pack

📏 Specifications

• Diameter: 16mm

• Length: approximately 120mm

• Retention hardware may include washers, split pins, R-clips or nuts depending on the installed bracket

• Measure bracket outside width and roller bore before ordering

🔄 Cross Reference & Related Parts

• Dunbier: 2981S

• Roller and bracket are sold separately unless specifically packaged together

• Use only a pin whose diameter and usable length match the assembly

🚤 Trailer Compatibility & Application

• Suitable for 3-inch/3.5-inch keel and bow rollers

• Not interchangeable with a smaller or larger pin merely because the roller length is similar

• Bracket holes must remain round and aligned

🔌 Function

Forms the rotating shaft for the trailer roller and transfers hull load into the roller bracket.

Common signs of wear or replacement:

• Pin is bent, deeply grooved or worn undersize

• Galvanising is lost and heavy corrosion is present

• Retaining holes or threads are damaged

• Roller binds because the pin is distorted

• Bracket holes have worn into the pin

🛠️ Installation & Safety

• Support the boat before removing a load-bearing pin

• Replace worn washers and retaining hardware

• Fit the pin squarely through aligned bracket holes

• Confirm the roller turns freely

• Secure both ends using the original retention method

📦 Condition

• Brand new Dunbier Marine Products trailer component

• Supplied as one display pack roller pin

• Supplied in original or equivalent packaging