Aluminium Hole Plugs - A Simple, Seamless Finish with Interference Fit Technology
When you're working with aluminium, every detail matters - especially when it comes to achieving a clean, professional final look. That’s why our CNC-machined aluminium hole plugs are designed with one core principle in mind: easy, reliable installation without adhesives or welding. With a precise interference fit, they tap securely into place using nothing more than a rubber mallet. No mess. No waiting. Just a perfect, permanent seal every time. It’s the simplest way to finish off exposed holes in aluminium fencing, structures, extrusions, and more - and it’s what sets Nelson’s CNC hole plugs apart from the rest.
Why Choose Aluminium Hole Plugs?
Every hole plug is CNC-machined from high-grade 6060 T5 aluminium - ideal for structural work thanks to its:
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High strength-to-weight ratio
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Superior corrosion resistance, even in coastal environments
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Fine surface finish, perfect for coating or texturing
The result? A high-quality, tight-fitting plug designed to last for years in both indoor and outdoor conditions.
Flush, Secure Fit - No Adhesives Needed
Each plug is machined for a precise interference fit. With a 3mm profile and a subtle chamfer, they tap into place effortlessly using a rubber mallet - sitting flush without the need for welding, glue, silicone, or any other bonding method.
Just tap in with a rubber mallet and your hole is securely sealed for good.
Ready to Finish
All our aluminium hole plugs are supplied in mill-finish aluminium, ready to be:
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Powder coated
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Anodised
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Timber-look sublimated
Whether you’re matching the plugs to a pre-coated fence, or finishing the entire assembly after install, a properly coated plug blends right into the structure.
Common Uses & Applications
These hole plugs are trusted by fabricators, installers, and DIY customers across Australia and internationally. Some typical uses include:
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Concealing fastener or drill holes in aluminium fencing, gates, or balustrades
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Finishing off structural tubes or industrial aluminium frames
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Sealing holes in architectural cladding, sun shade systems, or screens
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Providing a flush, professional look to aluminium projects, both functional and visual
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Preventing dirt, water or debris from entering open cavities
Thanks to their clean profile and easy tap-in installation, they're just as useful for DIY home projects as they are for commercial or industrial fabrications.
Size Options
Available in a wide range of metric sizes, our hole plugs are suitable for common tube, extrusion, and structural applications - from small pilot holes to larger structural openings.
Can’t find the size you need? Reach out - custom options are available.
Made in Australia. Used Worldwide.
All Nelsons CNC hole plugs are proudly made in-house at our Sunshine Coast factory. With over 15 years of manufacturing experience and a catalogue of 600+ CNC-machined aluminium parts, we're trusted by trades, builders, and businesses in Australia, New Zealand, the US and Canada.
Fast shipping. No minimums. Precision guaranteed.
Shop the Range
Browse hole plug sizes now and enjoy fast dispatch and friendly support.
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