Black, Grey, and White Plastic Pipe End Caps, Inserts, Bungs, and Washers
At Trebork, we supply quality plastic end caps, inserts, furniture and fence accessories right across the UK
Who We Are
We are Trebork, a company that distributes high quality, cost-effective plastic supplies throughout the UK. We stock hundreds of plastic end caps, inserts, washers, furniture feet, and garden accessories from a number of trusted industries and manufacturers.
Our goal as a company is to become the UK’s one-stop shop for plastic end caps and supplies for around the house. All our plastic end caps and bungs for square, rectangle, and round pipes, tubes, box sections are of premium quality and made of the best materials available on the market today.
At Trebork, we pride ourselves on being a dynamic and diverse company that is always developing and evolving with the UK market. Over the years we have worked hard to build a strong base of returning customers nationwide.
We are wholly committed to providing excellent customer service and client satisfaction. Our supply time are skilled, experienced, and passionate in ensuring you get exactly what you imagined for a great price.
What We Sell
Trebork specialise in plastic end caps and plastic bungs available in a variety of shapes and colours. We supply injection-moulded plastic end caps which are specifically designed to seal profiles, tubes, box sections, and pipes. Our plastic end caps come in black, grey, and white.
Our plastic bungs are made with an external piece that protrudes beyond the plastic profile, as well as an internal piece called a core, that has been hammered into the centre of the profile. The matt structure of the upper part of the plastic end cap gives it an aesthetic appearance. The plastic caps and plugs come with a rough surface finish designed to prevent scratching and damage in collective packaging.
The lower part of the end cap consists of a core and protruding ‘lamella’. When the end cap is hammered in, the lamella adjusts to the thickness of the tube wall.
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.
Polyethylene is a material that is completely physiologically inert, therefore it is fully approved for contact with food.
A Variety of Uses
Our plastic end caps and plugs are widely used in steel profile structures, metal tubing, pipes, 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 plastic end caps, bugs, inserts, or washers, 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 people are saying about Trebork Ltd
Our customers love Plastic End Caps From Trebork Ltd. Here are some of the featured reviews we’ve received.
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.