This Sam Allen 316 stainless corner gunwale cap is made for tidying up exposed rail ends on boats with around 35 mm gunwale width. The internal pocket runs 91 mm along the gunwale, with 35 mm internal width and 27.5 mm height, so you can match it against your existing extrusion before you drill. Two 5 mm countersunk screw holes make it a straightforward bit of gear to bolt on and get out there.

The cap uses marine grade 316G stainless steel so it holds up when you are docking in salty creeks week after week. The rounded corner profile spreads the load better than a sharp edge when you bump a pontoon or pylon at low speed. The compact size and fixed stainless shell give you solid gear for the price, a smart buy when you want corner protection without plastic caps cracking in the sun.

• Marine grade 316G stainless steel construction
• Suits gunwale sections approximately 35 mm wide
• Internal dimensions 91 mm (L) x 35 mm (W) x 27.5 mm (H)
• Round corner cap style for smoother rail edges
• Screw-on installation with 5 mm countersunk screws
• Helps cover and protect exposed gunwale corners
• Provides a tidy stainless finish to deck trim
• Suitable for use on a wide range of small boats
• Part number 29244 for easy reference
• Ideal for new builds or replacement of worn caps

Q: Can this gunwale cap be used on aluminium and fibreglass boats?

Yes. The 316G stainless steel cap can be fitted to both aluminium and fibreglass gunwales as long as the sizing matches. The internal dimensions of 91 mm x 35 mm x 27.5 mm are the key checks. If your existing gunwale extrusion is close to 35 mm wide it will generally suit. Just make sure the corner profile and thickness allow the cap to slide over before fixing.

Q: What size screws should I use with this corner cap?

Use 5 mm countersunk screws. The cap is drilled to suit 5 mm c/s hardware so the heads sit flush with the stainless surface. Stainless screws are usually the best match for 316G fittings on marine setups. Pre-drill pilot holes in the gunwale material to avoid splitting or deforming the trim. Always match screw length to the wall thickness of your gunwale.

Q: Do I need sealant under the gunwale cap when installing it?

Sealant is optional and depends on your setup. Many boaties run a thin bead of marine sealant under stainless fittings to help keep water out of hollow gunwales. A sealant layer can also reduce metal-to-metal noise on aluminium rails. If you add sealant, clean both surfaces with an appropriate solvent first. Wipe away any squeeze-out before it cures for a neat finish.

Q: Is this cap suitable for exposed saltwater moorings?

Yes. The cap is made from 316G stainless steel which is commonly used on marine hardware for saltwater service. This grade offers strong resistance to corrosion around jetties, ramps and swing moorings. Rinsing the area with fresh water after heavy salt exposure will still help extend its appearance. Regular checks of the 5 mm mounting screws are also a good habit on any moored boat.

• Suits gunwale sections with approximately 35 mm width
• Internal dimensions of 91 mm x 35 mm x 27.5 mm help confirm fit on existing gunwale profile
• Screw-on fitting using 5 mm countersunk screws through pre-formed holes
• Intended for use on gunwale corners in marine deck and trim setups