Square End Caps

Square End Caps

Square aluminum end caps from Nelsons CNC fit square aluminum tube. Choose square edge or radius edge to match the tube corner. Interference fit - no welding or adhesive.

Also see all aluminum end caps or Custom Size.

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

  • Square End Cap - Square Edge Square End Cap - Square Edge

    Square End Cap - Square Edge

    Square End Cap - Square Edge
    From $2.86
    From $2.86
    Our end caps are made from aluminum and are available in a range of sizes (imperial and metric sizing available).
    Select your size
    Value proposition message Value proposition message
  • Square End Cap - Radius Edge Square End Cap - Radius Edge

    Square End Cap - Radius Edge

    Square End Cap - Radius Edge
    From $2.97
    From $2.97
    Our end caps are made fro aluminum and are available in a range of sizes (imperial and metric sizing available).
    Select your size
    Value proposition message Value proposition message

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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In stock orders are sent the next day business day by International Priority Shipping.

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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.

Return Policy

Customer Support

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