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. We also have square end caps for thick and extra thick profile walls, available sizes include: 20x20mm, 25x25mm, 30x30mm, 40x40mm with rounded corners, 50x50mm, 60x60mm, 70x70mm, 80x80mm and 100x100mm. 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.

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.

Our square plastic end caps have been designed and tested to accommodate steel profile structures, steel tubing, pipes, and box sections, hollow section, 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.