Nelsons CNC

Press-Fit Aluminium End Caps - 600+ Sizes for a Tight, Weld-Free Finish.

Nelsons CNC Friction Fit Aluminium end caps are designed to match your extrusion size. No silcone or welding required.

Aluminium End Caps - Manufacturer and Supplier

Aluminium End Caps made to tightly fit blade and batten fencing

Nelsons CNC Aluminium End Caps precision-machined for a true interference fit in aluminium tube, posts, battens and extrusions. Manufactured in-house from premium 6060 T5 aluminium, each cap is designed for a tight knock-in fit with a bevelled edge for fast installation. Available in 600+ sizes, ready for powder coating, anodising or timber-look finishing.

Friction-Fit Metal Caps for Fence Posts

  • Easy install - knock in with a rubber mallet
  • Precision CNC machined with a bevelled edge for easy installation.
  • Over 600 sizes to match your extrusion
  • Aussie Made using premium 6060 T5
  • Mill-finished aluminium
  • Powder coat or wood grain image your end caps before or after your installation

Our metal caps are ideal for any aluminium project that demands strength, precision and weather resistance. Every metal capping is made to match your extrusion size, so you get a snug fit that stands up to tough Australian conditions. Browse our aluminium end caps range to find the right fit for your project.

Shop Aluminum End Caps

Aluminium end caps made to tightly fit the end of aluminium extrusions of all shapes and sizes

How To Guide

How To Install

How to install our end caps

How to Guide

Custom Sized End Caps

We can make any size aluminium end cap

We proudly partner with powder coating and wood finish experts

Frequently Asked Questions About Aluminium End Caps

Find answers to common questions about aluminium end caps, sizing, interference fit and installation.

End Cap FAQs
What is an aluminium end cap?

An aluminium end cap is a precision-machined insert designed to seal and finish the open end of aluminium tube, post, batten, slat or extrusion, creating a clean and secure finished end.

What does interference fit mean?

Interference fit means the aluminium end cap is machined slightly larger than the internal opening so it presses tightly into place and grips securely without welding, screws or glue.

How are aluminium end caps installed?

Our aluminium end caps are designed for quick knock-in installation using a rubber mallet. The bevelled edge helps guide the cap smoothly into the extrusion for a tight, secure fit.

Can you make custom size aluminium end caps?

Yes! We manufacture all custom aluminium end caps in-house. Simply provide your external dimensions, wall thickness and corner radius, and we’ll quote your required size. We suggest using a vernier as we require the exact measurement to ensure the end cap fits perfectly.

Square End Caps

Our square aluminium end caps are CNC-machined to provide a sleek, press-fit finish for square aluminium extrusions. Designed with a radius edge, these end caps fit securely without the need for adhesives or welding. Simply knock them in with a rubber mallet for a permanent, professional finish. Crafted in-house from premium 6060 T5 aluminium, our metal cappings ensure long-lasting durability for fencing, balustrades, handrails and facades.

Rectangle End Caps

Designed for rectangular aluminium extrusions, our rectangular end caps provide a tight, secure fit with a press-fit design — eliminating the need for welding. Each metal capping is CNC-machined to exact specifications, ensuring a perfectly flush installation that won’t loosen over time. Easy to install, simply tap the cap in with a rubber mallet until firmly in place. Made from high-quality 6060 T5 aluminium, these metal caps are built to withstand the elements.

Nelsons CNC: Expert Metal Capping Manufacturer

We offer custom-sized metal caps tailored to your exact extrusion dimensions. Simply provide your measurements, and we’ll precision-machine the metal capping to suit.

Our custom metal cappings are ideal for high-end architectural applications where precision and appearance matter. They eliminate the need for welded plates, providing a tight, secure press-fit installation that doesn't require adhesives or welding. The result is a flush, permanent finish that gives your project a clean, professional edge.

Contact our team to request sample metal cappings, and we’ll send a few out to get you started.