Round End Caps

Round End Caps

Round aluminum end caps fit round aluminum tube. Hole plugs are a different product - they fill a hole in a panel, they do not cap a tube end.

Also see all aluminum end caps or Custom Size.

Guides: how to measure, aluminum vs plastic, square vs radius edge.

  • Round End Cap Round End Cap

    Round End Cap

    U.S. Round End Cap
    From $3.03
    From $3.03
    Our round end cap are made from aluminum and are available in a range of sizes (shown in inches).
    Select your size
  • Hole Plug Hole Plug

    Hole Plug

    U.S. Hole Plugs
    From $2.20
    From $2.20
    All our hole plugs are made from aluminum and are available in a range of sizes (shown in inches).
    Select your size

Buying questions

How do I order the correct size?

Measure the outside of the tube and the wall thickness. Use a caliper if you can. Check all four sides. Order the matching outside size and wall. Step-by-step: how to measure aluminum tube for end caps. If the tube has radiused corners, see square edge vs radius edge.

Do these fit pipe or tube?

The same cap can fit pipe or tube if the measured outside size and wall match. Pipe names (schedule 40) are not tube sizes. See aluminum pipe end caps vs tube end caps. Measure, then use Custom Size if the size is not listed.

Aluminum or plastic?

Aluminum matches aluminum tube for thermal expansion in heat and cold. Plastic often loosens when the tube expands. More detail: aluminum vs plastic tube end caps.

Can you make a size that is not listed?

Yes. Use the Custom Size page with outside size and wall thickness.

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30-Days Return

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

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Unsure what size end cap you require? Looking for a custom sized cap? Our expert team are available to answer any questions.

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Square End Caps

Square End Caps

Three round aluminum end caps on a wooden surface

Round End Caps

Aluminum End Caps