19.5-21.7mm Round Expanding Tube Adaptor for Bolt Hole Castors with Threaded Stud

Castor Accessories

This round expanding tube adaptor lets you fit a single bolt hole castor into the open end of a round tube leg with an internal diameter of 19.5mm to 21.7mm. Push it into the tube, tighten the stud and the ribbed grey sleeve expands to grip the inside wall firmly. The threaded stud left at the bottom then takes your bolt hole castor, giving a secure internal fixing for castors on trolleys, chairs, tables, racks and tube-framed furniture.

If you are looking for a round tube castor insert, a 19.5mm to 21.7mm round tube adaptor, a castor fitting for 25mm outside diameter round tube or a simple way to add wheels to round tube furniture, this adaptor is a quick, tidy and reliable solution.

Why Choose This Adaptor

• ✓ Expanding grip locks firmly inside the tube as the stud is tightened, with no welding or drilling.
• ✓ Suits round tube with a 19.5mm to 21.7mm internal diameter.
• ✓ Threaded stud with nut for fitting a single bolt hole castor.
• ✓ Ribbed grey sleeve on black body for a secure, even grip.
• ✓ Supplied complete and ready to fit.

* Castor sold separately. Measure the inside diameter of your round tube before ordering: this adaptor suits 19.5mm to 21.7mm.

Where It Works Best

This adaptor is ideal for round tube trolleys, hotel serving and catering trolleys, chairs and stools, small tables, clothes rails, display stands and tube-framed furniture. It is a neat way to add castors to a frame that has open round tube legs and no mounting plate.

Frequently Asked Questions

How does an expanding tube adaptor work?

Push the adaptor into the open end of the tube, then tighten the stud. This pushes the grey sleeve outwards so it grips the inside of the tube firmly.

What size tube does it fit?

It suits round tube with an internal diameter of 19.5mm to 21.7mm. Measure across the inside of the tube, not the outside, before ordering. Smaller and larger sizes are also available.

Is a castor included?

No, the castor is sold separately. The adaptor is designed to take a single bolt hole castor on its threaded stud.

Can I use it on square tube?

No, this version is shaped for round tube. For square tube legs, choose a square tube adaptor in the matching size.

Do I need to drill or weld the tube?

No. The adaptor grips inside the tube by expansion, so no drilling or welding is needed as long as the tube end is clean and open.