Every great aluminium fence, balustrade, or gate system depends on attention to detail - and nothing showcases that more clearly than a neatly finished post base. That’s where aluminium cover plates come in.
At Nelsons CNC, we manufacture high-quality CNC-cut aluminium cover plates designed to slide easily over aluminium posts to neatly cover a core hole, achieving a sharp, professional appearance.
They’re the small detail that transforms a good project into a great one.
What Are Aluminium Cover Plates?
An aluminium cover plate is a flat, precision-cut piece of aluminium with a central hole designed to fit snugly around a post. Its job is simple: to conceal the base plate or mounting hole, leaving a clean, tidy transition between post and surface.
Whether you’re installing fencing, gates, screens, or architectural aluminium features, a well-fitted cover plate ensures the finished product looks complete and high-end.
Manufactured for Precision and Consistency
At Nelsons CNC, every cover plate we produce is cut on our CNC machining centres using premium grade 6060 T5 aluminium.
This process guarantees:
- Perfect accuracy - Each plate is identical, so you can expect a consistent fit across multiple posts.
- Smooth, clean edges - CNC eliminates burrs or sharp edges common with manual cutting.
- Professional tolerances - Fitment is tight enough to look clean but loose enough to slide on without damage.
- Minimal waste - CNC optimisation maximises sheet usage, making production efficient and sustainable.
Our machining process allows for intricate designs and precise alignment - ideal for modern aluminium fencing systems where visual consistency is key.
Available Shapes and Options
Because no two projects are exactly alike, we manufacture aluminium cover plates in three popular shapes to suit a wide range of fencing and architectural applications:
Perfect for circular aluminium posts or tubular sections. Commonly used in balustrades, handrails, and custom gate systems, round plates provide a clean and modern finish.
The most popular option for fencing and gate posts. Square cover plates complement architectural aluminium systems and are frequently paired with modern powder-coated colours like Monument, Surfmist, and Woodland Grey.
Ideal for posts or frames that use rectangular extrusions. These plates ensure every mounting hole or base plate is neatly concealed, maintaining the professional aesthetic your customers expect.
If you need something unique, we can also custom machine your cover plates to any shape or size - including non-standard hole dimensions, radius corners, or special mounting cutouts.
Mill Finish – Ready for Powder Coating
We supply all Nelsons CNC aluminium cover plates in mill finish as standard.
This raw aluminium surface provides the perfect base for powder coating, allowing you to match your plates to the exact colour of your fence or gate posts.
Common powder coat colours include:
• Monument - for a strong architectural look
• Surfmist - bright and coastal
• Woodland Grey - modern and understated
• Satin Black - timeless and professional
Once coated, the cover plate blends seamlessly into your project, creating a flawless, colour-matched finish that hides fixings and imperfections. We partner with Kote It as experienced provider of powder coating services.
Why Choose Nelsons CNC?
At Nelsons CNC, we’ve built our reputation on precision, reliability, and attention to detail.
We don’t just cut aluminium - we engineer solutions for professionals who take pride in their work.
Here’s why trade clients across Australia choose us:
• Australian-Made Quality: Locally manufactured with strict quality control.
• CNC Accuracy: Consistent and repeatable precision across every batch.
• Custom Options: We can cut any shape or size to fit your design requirements.
• Powder-Coat Ready: Supplied in mill finish for complete colour flexibility.
• Trade Prices Available: Register here.
• Fast Turnaround: Efficient production ensures short lead times and reliable delivery.
We understand the fencing and fabrication industry, and we design our products to make your installations faster, neater, and more professional.
View our full Cover Plate Range here