Round tube insert, domed, Ø 40 mm, black

The black domed Round tube insert, Ø 40 mm protects the open ends of tubes. Its rounded domed head provides a neat finish to the tube end, while the ribbed internal section with fins fits inside the tube to hold the insert in place.

The finned design accommodates tubes with varying wall thicknesses, making it easier to use one insert for tubes with slightly different specifications. The black finish blends visually with dark structures.

Applications and selection

Plastic inserts are commonly used to close tube ends in furniture, display systems and lightweight structures. When selecting an insert, it is essential to match the nominal tube diameter and wall thickness to the dimensions of the internal section. The product is sold individually, making it easy to order the quantity required for a specific project.

Insert construction — the component consists of a domed external section that remains visible at the tube end, and an internal section with a core and fins that slides into the tube. The heights of both sections, the core and fin dimensions, and the tube wall thickness range are listed in the specification tables below.