20mm Round Ribbed Tube Insert

These 20mm round ribbed tube inserts are designed to provide a clean, secure finish for hollow round tubes and pipes. Thanks to the flexible lateral ribs running around the shank of the insert, they should be suitable for tube wall thickness of between 1 to 2mm metric (14-20 gauge imperial), unless otherwise stated. 

Manufactured from durable LDPE plastic, they are commonly used as protective end caps, tube feet, and finishing plugs across furniture, fabrication, and light industrial applications. They're designed to retain themselves inside tube, with the head sitting over the outer ends of the tube or pipe, sitting flush with the outside circumference of the tube and providing a neat finished appearance.

Key Features:

• Fits hollow tube or pipe with a 20mm outer dimension
• Manufactured from resilient LDPE
• Ribbed design for secure fitting
• Helps protect floors from exposed tube ends, reducing noise and marking
• Available in multiple colours
• Designed primarily for indoor use but can be used outside but not UV stabilised as standard

Technical Information:

• Tube or pipe shape: Round
• External tube size: Ø20mm
• Tube wall thickness: 1–2mm
• Suggested internal fit: 16-18mm approx. (different factors affect this, including coatings, weld lines and tolerance)
• Material: Low-Density Polyethylene (LDPE)
• Fitting type: Push-fit ribbed insert

Suitable for:

• Office and workshop furniture
• Chairs and tables
• Round hollow tubes and pipes
• Display systems
• Gates and railings
• Light fabrication projects
• Protective tube end finishing
• POS and Shopfitting

Tube inserts are always listed the same way that tube is listed because the head of the insert needs to marry up with the outside edges of the tube.  They often come in a variety of wall thicknesses and gauge sizes but if you're unsure on fit, you can click the 'Request Sample' button, or for help measuring your tube, try out this useful sizing pdf.

If this isn't quite right for your application, check out our domed, angled, chrome and metal inserts and if you're not looking to plug the end of a piece of hollow tube and instead after a generic hole plug, then maybe one of our covers caps or panel plugs will work better for you.

   Why not submit your own review?

Submitted by Pbc (14/02/2025)
Excellent quality

Quality
Accurate Description
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Overall Score	5.0 / 5

Submitted by Paul (2/10/2019)
These are beautiful quality parts which fit well and enhance my product most satisfactorily. Superior to those examined from other sources.

Quality
Accurate Description
Performance/Suitability
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Overall Score	5.0 / 5

Submitted by Mr Mo Mokhtar (3/05/2018)
Fantastic speedy service

Quality
Accurate Description
Performance/Suitability
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Overall Score	5.0 / 5

Submitted by Mr John Wakeman (13/02/2017)
Fast service Thank you to Jason for his help

Quality
Accurate Description
Performance/Suitability
Value for money
Overall Score	5.0 / 5

Submitted by Chris F (2/09/2016)
What else can you say about a plastic plug!

Quality
Accurate Description
Performance/Suitability
Value for money
Overall Score	5.0 / 5

Submitted by Mr Paul Saunders (12/08/2015)
Perfect !!

Quality
Accurate Description
Performance/Suitability
Value for money
Overall Score	5.0 / 5

Frequently asked questions about this item are shown below. Do you have a question? Submit FAQ

Q: I'm after ones that will slide rather than non slip do these slide

A: these should slide ok but I see there's an orange 'Request a Sample' button on the product page that you can click, to get a sample ordered online. Alternatively the chrome capped inserts also slide very well, so maybe you could consider that - again, there's likely to be a sample request button on this item also.

 Tube Fittings Buying Guide