Round End Caps

Nelsons CNC round end caps are CNC-machined from 6060 T5 aluminium for a precise, friction-fit into circular aluminium extrusions. Each cap installs flush with a few taps from a rubber mallet; no welding, adhesives or plastic inserts required.

Built for fencing, balustrades, handrails and facades, these caps deliver a clean, permanent finish that lasts. For a seamless look, they can be powder-coated or wood grain imaged before or after installation to match your project.

Browse all aluminium end caps for circular, square and rectangular extrusions.

  • Round-End-Cap-sm Round End Cap6

    Round End Cap

    Round End Caps
    From $2.80
    From $2.80
    Our aluminium end caps are available in a range of sizes (shown in mm)
    Select your size

Sizing for standard and custom extrusions

We stock round caps to suit most standard aluminium circular hollow sections used in fencing and architectural work. With a wide range of sizes available, you’re likely to find a cap that fits your job exactly.

If you’re working with a custom or non-standard profile, we also offer custom-sized end caps machined to your exact extrusion measurements. For added confidence, you can request a sample cap to test fit before ordering in full, ideal for installers, builders or fabricators planning large-scale projects.

Reliable fit for outdoor performance

All round caps are engineered for strength and longevity. The tight interference fit ensures they stay in place without shifting or loosening, even in exposed outdoor environments. A simple knock-in install with a rubber mallet delivers a permanent, flush result, no fasteners, adhesives or welding required.

Each cap is precision-machined in-house for dimensional accuracy and a consistent finish. Our caps are made from high-grade 6060 T5 aluminium for long-term performance in Australian conditions.

Same Day Shipping

Orders received by 12 p.m. are sent the same day by Overnight Express Shipping. For our international customers, please visit our store here.

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30-Days Return

If you are not satisfied with your product, contact us within 30 days of purchase to arrange an exchange or refund.

Return Policy

Customer Support

Are you unsure what size end cap you require? Are you looking for a custom-sized cap? Our expert team is available to answer any questions.

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Press fit aluminium end caps

Square End Caps

Tightly fitting Round end caps

Round End Caps

Aluminium End Caps

Why choose Nelsons CNC

At Nelsons CNC, we specialise in friction-fit aluminium end caps designed for professional, permanent results. Our caps help tradespeople save time, reduce material waste and deliver consistent finishes with minimal effort.

All orders placed before 12 p.m. are dispatched the same day via Overnight Express. Every purchase is backed by a 30-day return policy for peace of mind.

Contact our team for sizing help, sample requests or to place a custom order today.