50x50mm Square Ribbed Tube Insert, 1-2.5mm

These 50x50mm 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 2.5mm metric (12-20 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 50x50mm 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: 50x50mm
• Tube wall thickness: 1-2.5mm
• Suggested internal fit: 45x45mm to 48x48mm 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 pete (22/02/2025)
Speed of the delivery was mind blowing order placed Tues pm delivery arrived Wed midday

Quality
Accurate Description
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Overall Score	5.0 / 5

Submitted by Sharon Olde (11/12/2020)
Fantastic disruption. Super fast

Quality
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Overall Score	5.0 / 5

Submitted by Dave (23/01/2020)
first class service my order arrived the following morning .

Quality
Accurate Description
Performance/Suitability
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Overall Score	5.0 / 5

Submitted by Julie (1/07/2019)
Very good service

Quality
Accurate Description
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Overall Score	5.0 / 5

Submitted by chris tweed (6/06/2019)
2x2 plugs

Quality
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Overall Score	5.0 / 5

Submitted by Jon Ford (5/06/2019)
Arrived quickly and was exactly as described

Quality
Accurate Description
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Overall Score	5.0 / 5

Submitted by Leonard Smith (22/11/2018)
Brilliant product.
First class service.

Quality
Accurate Description
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Value for money
Overall Score	5.0 / 5

Submitted by Alistair (21/08/2018)
Just the job to finish off son’s A level DT project from 10 years ago! Now being used as workshop table!

Quality
Accurate Description
Performance/Suitability
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Overall Score	5.0 / 5

Submitted by Mr Jon Collinson (7/08/2017)
Ordered these before lunchtime and also paid for next day delivery and didn't get them until the day after they were supposed to be delivered. Money wasted :( and will not use the next day delivery option again.

Response from BPF Websales
Thanks for your comments and I just looked into this for you because I was concerned that there may have been a problem with our overnight service in this instance - but I can see that instead of paying online at the time of ordering which most of our customers would do, particularly if they needed something urgently - you opted to have a proforma invoice emailed to you which is inevitably going to convolute the process.

It's obviously standard practice with proforma invoices for the merchant to wait for payment to come through before releasing the order, which is why if something is required quickly - we'd always suggest customers pay online at time of ordering! However, we do advise customers choosing the proforma option, to at least email over a remittance when the payment is made - so our accounts at least know to check the bank. So if this was done as requested, I'd appreciate you emailing us a copy so I can raise it with the accounts department here - and if I find something was overlooked, I can look at refunding you the overnight element?

Quality
Accurate Description
Performance/Suitability
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Overall Score	4.3 / 5

Submitted by Mr Philip Newbold (14/11/2016)
Very quick delivery thank you BPFonline

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

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• Material Data Sheet 1
• Material Data Sheet 2

 Tube Fittings Buying Guide