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Square Plastic Box Section, Plastic Bungs, Hole Inserts, and Cover Caps

At Trebork, we supply quality square plastic tube inserts in different colours, shapes, and sizes right across the UK

Plastic End Caps for Steel Tubing

Here at Trebork, our square plastic end caps and tube inserts are on of our most popular items in stock and are available in a variety of shapes and colours. We supply injection-moulded plastic end caps which are specifically designed for steel tubing.
Our square plastic end caps come in black, grey, and white with sizes varying from 10x10mm to 150x150mm.
Whatever the purpose, our online range of plastic bungs and inserts are made from the highest quality materials from trusted manufacturers. The plastic end plugs for square tubing are available flat, pyramid.

Quality Guaranteed

The plugs we sell are made from polyethylene which offers universal appeal and a number of application possibilities. Polyethylene is known for its low abrasion and resistance to corrosion from environmental stress. It’s also got high dimensional stability at low temperatures, good chemical resistance, low water absorption and is resistant to changing weather conditions and UV radiation.

A Variety of Uses

Our square plastic end caps have been designed and tested to accommodate steel profile structures, steel tubing, pipes, and box sections, tubes, chair legs, chair foot, bench foot, fencing systems, some machines and devices, workshop furniture, playground equipment and other elements of garden architecture. They are used in the furniture, machinery, electrical engineering and construction industries.
So, if you’re looking for quality square plastic end caps and inserts, choose Trebork for all your accessory needs. We are based in Stoke-on-Trent but deliver our quality products right across the UK.

FREE deliveries on all orders over £25 to the UK Mainland

what a fantastic company to buy from

what a fantastic company to buy from . super fast easy transaction and delivery 5* service thank you.

Susan

Fabulous service

Fabulous service – many thanks ⭐️⭐️⭐️⭐️⭐️

Tamsin

Excellent!!!!

Excellent , fast delivery , recommend seller. prefect very pleased thank you.

Barry

A pleasure to do business with!

A pleasure to do business with! Exactly as described and well packaged! Recommended!

Kyle

Second set I have bought now!!!

Second set I have bought now as they are much better than the originals that came with the chairs. Super fast delivery, thank you

Hannah

Perfect!

Perfect! BEST PRICE very QUICK service! Thankyou ⭐️ ⭐️ ⭐️ ⭐️ ⭐️ perfect fit

Daniel

Just what I needed

Just what I needed arrived the next day great service

Melanie

Absolutely amazing service

Absolutely amazing service. Ordered Tuesday afternoon, delivered by Royal Mail 10:30am Wednesday. Excellent range of tubular blanking inserts/feet I’ve not seen elsewhere. Job done by midday. I highly recommend this seller.

Ken

Perfect Fit

Perfect! BEST PRICE very QUICK service! Thankyou ⭐️ ⭐️ ⭐️ ⭐️ ⭐️ perfect fit

Danny

Well Happy !!!

Easy purchase, and quick delivery time, item in better condition than expected from the description, well happy, Thanks!!!.

John

Great Quality

Second set I have bought now as they are much better than the originals that came with the chairs. Super fast delivery, thank you

Tina

Very pleased with it

Perfect replacement for garden furniture. Great seller with many other options.

Paul