Square tube insert 20×20 mm, blue (RAL 5005)

The blue (RAL 5005) Square tube insert 20×20 mm provides a neat and safe finish for the open ends of closed-section tubes. Made from polyethylene, it features a flange and ribs that allow it to fit into tubes with a wall thickness of 1.0–2.5 mm.

Inserts of this type are used in steel and aluminium structures, frames, railings, metal furniture and equipment components where the open end of a tube needs to be protected against dirt and debris and sharp edges need to be covered. The flange covers the edge of the tube, giving the joint a neat appearance.

For installation companies

Before purchasing, measure the external dimensions and wall thickness of the tube and compare them with the insert specifications. The internal section with ribs fits inside the tube and holds the insert in place, while the external section creates a smooth, neat edge.

When selecting an insert, both the nominal tube dimensions and the wall thickness are important, as they determine how the ribs fit inside the tube. Polyethylene inserts are commonly used where a lightweight, neat finish in a chosen colour is needed for the end of a tube.