Hole Plugs

Regular price
From $3.22
Sale price
From $3.22
Shipping calculated at checkout.

Our hole plugs are available in a range of sizes (shown in mm). Each plug is precisely CNC-machined from high-quality 6060 T5 aluminium, known for its excellent strength-to-weight ratio, corrosion resistance and smooth surface finish. Designed for a flush, professional look, these aluminium hole plugs provide a permanent mechanical fit without the need for adhesives or welding.

With a total thickness of 3mm and a subtle chamfer on the edge, they install cleanly and sit securely in place — ideal for both indoor and outdoor applications where durability, performance and visual appeal matter.

HOW THICK ARE HOLE PLUGS?

DO I NEED HOLE PLUGS OR ROUND END CAPS?

HOW LONG WILL MY ORDER TAKE?

WHY CHOOSE OUR ALUMINIUM HOLE PLUGS?

Need a custom size?

Contact us

25mm aluminium hole plug application example

Product details

Using Hole Plugs

Our aluminium hole plugs are ideal for covering exposed holes in extrusions, frames or structural tubing. Whether you need to seal unused drill holes or improve the visual finish of a structure, these plugs are designed to offer a tight mechanical fit without adhesive or welding. Hole plugs are supplied in mill-finish aluminium, ready to be powder coated, wood grain imaged or anodised.

Common uses include:

  • Concealing fastener holes in fencing or balustrades
  • Finishing off industrial aluminium structures
  • Providing a flush, professional look to metalwork projects

Thanks to their low-profile design and easy installation, these plugs are suitable for both DIY and commercial use.

If you're unsure about sizing or need help choosing between plug types, we're here to assist. Contact us and we’ll help you find the perfect fit.

Hole Plugs

Available Sizes

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14HP TopView
x 14HP TopView
14mm
SKU: 14HP
$3.22
QuantityPrice
1$3.22
  • 1$3.22
  • 50$2.74
  • 100$2.58
  • 500$2.42
  • 1000$2.26
16HP TopView
x 16HP TopView
16mm
SKU: 16HP
$3.34
QuantityPrice
1$3.34
  • 1$3.34
  • 50$2.84
  • 100$2.68
  • 500$2.51
  • 1000$2.34
18HP TopView
x 18HP TopView
18mm
SKU: 18HP
$3.49
QuantityPrice
1$3.49
  • 1$3.49
  • 50$2.97
  • 100$2.80
  • 500$2.62
  • 1000$2.45
19HP TopView
x 19HP TopView
19mm
SKU: 19HP
$3.57
QuantityPrice
1$3.57
  • 1$3.57
  • 50$3.04
  • 100$2.86
  • 500$2.68
  • 1000$2.50
20HP TopView
x 20HP TopView
20mm
SKU: 20HP
$3.68
QuantityPrice
1$3.68
  • 1$3.68
  • 50$3.13
  • 100$2.95
  • 500$2.76
  • 1000$2.58
21HP TopView
x 21HP TopView
21mm
SKU: 21HP
$3.68
QuantityPrice
1$3.68
  • 1$3.68
  • 50$3.13
  • 100$2.95
  • 500$2.76
  • 1000$2.58
22HP TopView
x 22HP TopView
22mm
SKU: 22HP
$3.80
QuantityPrice
1$3.80
  • 1$3.80
  • 50$3.23
  • 100$3.04
  • 500$2.85
  • 1000$2.66
25HP TopView
x 25HP TopView
25mm
SKU: 25HP
$3.91
QuantityPrice
1$3.91
  • 1$3.91
  • 50$3.33
  • 100$3.13
  • 500$2.94
  • 1000$2.74
28HP TopView
x 28HP TopView
28mm
SKU: 28HP
$4.14
QuantityPrice
1$4.14
  • 1$4.14
  • 50$3.52
  • 100$3.32
  • 500$3.11
  • 1000$2.90
30HP TopView
x 30HP TopView
30mm
SKU: 30HP
$4.26
QuantityPrice
1$4.26
  • 1$4.26
  • 50$3.63
  • 100$3.41
  • 500$3.20
  • 1000$2.99
32HP TopView
x 32HP TopView
32mm
SKU: 32HP
$4.26
QuantityPrice
1$4.26
  • 1$4.26
  • 50$3.63
  • 100$3.41
  • 500$3.20
  • 1000$2.99
38HP TopView
x 38HP TopView
38mm
SKU: 38HP
$4.60
QuantityPrice
1$4.60
  • 1$4.60
  • 50$3.91
  • 100$3.68
  • 500$3.45
  • 1000$3.22
43HP TopView
x 43HP TopView
43mm
SKU: 43HP
$4.83
QuantityPrice
1$4.83
  • 1$4.83
  • 50$4.11
  • 100$3.87
  • 500$3.63
  • 1000$3.39
45HP TopView
x 45HP TopView
45mm
SKU: 45HP
$5.29
QuantityPrice
1$5.29
  • 1$5.29
  • 50$4.50
  • 100$4.24
  • 500$3.97
  • 1000$3.71
Hole Plugs - 1 inch
x Hole Plugs - 1 inch
1 inch
SKU: US1IHP
$3.91
QuantityPrice
1$3.91
  • 1$3.91
  • 50$3.33
  • 100$3.13
  • 500$2.94
  • 1000$2.74

Order quality aluminium hole plugs or caps today at Nelsons CNC

Choose from our standard hole plug sizes ranging from 16mm to 43mm, perfect for most aluminium extrusions and structural applications. Select your size above to get started, or browse our full aluminium end caps collection for more options.

If you need a specific size not offered in our standard lineup, request a custom size. Rest assured, all plugs are CNC-machined for consistency, clean finishes and a secure press-fit.

FAQs

Where can I use these hole plugs? What kinds of projects benefit the most?

Aluminium hole plugs are widely used across residential, commercial and industrial projects. They are commonly installed in aluminium tubing, posts, rails, frames and fabricated sections to close exposed holes left from drilling, fastening or manufacturing processes.

Projects that benefit most include balustrades, fencing, handrails, gates, architectural features, signage, machinery frames and custom metal furniture. They are ideal for applications where exposed holes need to be protected from dust, moisture and debris while maintaining a tidy appearance.

Aluminium hole plugs work particularly well in projects that require both functional protection and a refined finish.

What makes aluminium hole plugs different from plastic or rubber ones?

Aluminium hole plugs are designed for applications where durability, stability and appearance matter. Unlike plastic hole plugs, aluminium does not become brittle with age or exposure to heat. It keeps its shape and fit, even when installed in areas that experience regular use or environmental changes.

Compared to rubber plugs, aluminium provides a firmer and more secure closure. Rubber can compress, stretch or deteriorate over time, particularly when exposed to cleaning chemicals, moisture or repeated movement.

Aluminium remains stable and helps maintain a consistent finish. This makes aluminium hole plugs especially suitable for metalwork, structural profiles and visible installations where a clean and professional result is required.

What if my hole diameter isn’t among the standard sizes? Can I still use these hole plugs?

If your hole diameter is not available in our standard size range, a custom size can be requested. This is a practical option for projects that require exact measurements or involve non-standard drilling, fabrication or profiles.

All aluminium hole plugs are CNC-machined to deliver consistent sizing, clean finishes and a secure press fit. This level of machining accuracy helps ensure the plug sits flush and stays in place once installed.

Custom sizing allows you to maintain the same quality, appearance and fit across your project, even when working with unique specifications or specialised applications.

What if my project has multiple holes of different sizes?

Projects with multiple hole sizes are common, particularly in fabricated metalwork and custom builds. Aluminium hole plugs are available in a wide range of diameters, allowing you to match each hole size accurately and achieve a uniform result.

Using the correct size for each hole helps ensure a secure fit and consistent appearance across the project. This approach is especially useful for large installations where visual consistency and build quality are important.

Planning for multiple sizes also helps streamline installation and reduces the need for workarounds during assembly.

Are these hole plugs suitable for outdoor or heavy-duty use? Will they hold up over time?

Aluminium hole plugs are well-suited to outdoor and heavy-duty applications.

Aluminium naturally resists corrosion and performs well in environments exposed to weather, moisture and temperature changes. This makes these plugs a reliable option for external installations such as fencing, balustrades and structural frames.

Over time, aluminium maintains its strength and appearance without cracking, swelling or breaking down. When installed correctly, aluminium hole plugs provide lasting protection for exposed holes and help preserve the integrity of the surrounding material.

Can these plugs handle frequent cleaning, impact or movement?

Aluminium hole plugs are designed to perform well in environments that involve regular cleaning, occasional impact or ongoing movement. Aluminium does not absorb moisture or degrade when cleaned, making these plugs suitable for areas that require routine maintenance.

In applications where surfaces may experience light knocks or vibration, aluminium hole plugs remain stable and resist loosening when correctly fitted. This makes them suitable for workshops, public spaces, machinery housings and other areas where durability and reliability are essential.

nelsons

Aluminium End Caps
will finish off the job beautifully

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