1x1 Inch Square Ribbed Tube Insert, 14-20g

These 1x1" square ribbed tube inserts are designed to provide a clean, secure finish for square tube and box section. 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 box section, sitting flush with the outside edges of the tube, providing a neat finished appearance.

Key Features:

• Fits hollow tube or box section with a 1x1" external 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 box section profile: Square
• External tube size: 1x1"
• Tube wall thickness: 14-20 Gauge
• Suggested internal fit: 21x21mm to 23x23mm approx. (different factors affect this, including coatings, weld lines and tolerance)
• Material: Low-Density Polyethylene (LDPE)
• Fitting type: Push-fit ribbed insert

Suitable for:

• End Stops for Office and Workshop furniture
• Foot Bungs for Chairs and Tables
• Plastic Stoppers for square hollow tubes and box section
• Feet for Display Systems
• Post Caps for Gates and Railings
• Tube End Caps for Light Fabrication projects
• Protective Tube Ends for Finishing
• Ribbed Knock In Inserts for 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, if for instance you want inserts or feet for an angled chair leg or just simply prefer something with a more enhanced cosmetic head than a bog standard flat insert, then take a look at our range of domed, angled or pyramid head inserts.  We've also got All-Metal Inserts and Square Threaded Inserts for Feet & Castors but if you're not finding what you're needing then just give us a call, drop us an email or use the livechat facility.

   Why not submit your own review?

Submitted by Martin Horton (19/02/2026)
Excellent.

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Overall Score	5.0 / 5

Submitted by Martin Horton (9/12/2025)
Consistent performance

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Overall Score	4.8 / 5

Submitted by tony hill (10/10/2025)
as always 5 stars

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Overall Score	5.0 / 5

Submitted by tony hill (7/07/2025)
AS ALWAYS SERVICE IMPECCABLE

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Overall Score	5.0 / 5

Submitted by Mr David Bulloch (21/09/2024)
Perfect fit for 1 tube

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Overall Score	5.0 / 5

Submitted by Martin Horton (17/06/2024)
Fit for the intended purpose

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Overall Score	4.8 / 5

Submitted by Martin Horton (10/04/2024)
Accurate description good product.

Quality
Accurate Description
Performance/Suitability
Value for money
Overall Score	4.8 / 5

Submitted by Martin Horton (20/02/2024)
Have used these for years. A good tight fit in our 25mm square tube.

Quality
Accurate Description
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Overall Score	4.8 / 5

Submitted by Ivor Griffiths (6/09/2023)
Exellent service

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Overall Score	5.0 / 5

Submitted by Martin Horton (14/07/2022)
No additional comment

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Accurate Description
Performance/Suitability
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Overall Score	4.8 / 5

Submitted by Alicja Michalska (28/06/2022)

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Overall Score	5.0 / 5

Submitted by steve tanfield (29/03/2022)
PERFECT.WELL MADE

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Overall Score	4.8 / 5

Submitted by Mark Spicer (15/10/2021)
All good thanks but expensive compared to previous purchases.

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Overall Score	4.5 / 5

Submitted by Mark Spicer (13/11/2020)
Supplied as described. Thank you

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Overall Score	4.5 / 5

Submitted by David D (25/09/2020)
Easy to order and quick delivery

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Overall Score	5.0 / 5

Submitted by Mark Spicer (1/09/2020)
Good service as normal

Quality
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Performance/Suitability
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Overall Score	4.8 / 5

Submitted by Mrs Maria Parr (11/06/2020)
Online order

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Overall Score	5.0 / 5

Submitted by Stephen Clegg (10/06/2020)
Fit exactly due to the explanation of the diagrams. Very professional and thorough.

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Overall Score	5.0 / 5

Submitted by Patrick Thorpe (9/05/2019)
We use these as stainless steel tube end caps, and they are a very good match. Better than black standard which stand out too much - worth paying a little more for

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Overall Score	4.8 / 5

Submitted by Dr Robin Poore (19/01/2019)
Great price & delivery. Used for capping top of sheep hurdles to stop them filling with water, freezing and splitting.

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Overall Score	5.0 / 5

Submitted by John (4/09/2018)
The goods arrived next morning in the post - excellent service.

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Overall Score	5.0 / 5

Submitted by Ms Suzanne Fegan (29/10/2017)
Samples provided by company helped me make right decision.
Very good customer service!!

Quality
Accurate Description
Performance/Suitability
Value for money
Overall Score	4.5 / 5

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