These ribbed inserts fit inside hollow tubes. Choose rectangular end caps for rectangular box sections, or oblong end caps for profiles with straight sides and rounded ends. Match the profile shape, outside dimensions and tube wall thickness before ordering.
These caps fit over the outside of rectangular fence posts and tubes. Measure both outside dimensions of the post and compare them with the fitting size shown on the product page.
TREBORK supplies plastic end caps for rectangular box sections, oblong tubing and rectangular fence posts across the UK. Choose an internal ribbed insert or an external cover to suit your profile. Buy from one piece, with no minimum order.
Our rectangular plastic end caps fit inside rectangular hollow sections. Also known as rectangular tube inserts, plastic bungs, ribbed end plugs and box section blanking plugs, they have ribs that grip the inner walls while the top covers the cut end.
Typical applications include furniture frames, suitable chair and table legs, workshop equipment and fabricated metal assemblies. Selected sizes are available in black, grey and white, with different fitting ranges for tube wall thickness. Check the product options for the required size and colour.
Oblong plastic end caps are designed for profiles with two straight sides joined by rounded ends. These oblong tube inserts and bungs follow a different outline from rectangular inserts, so the shape must match as well as the dimensions.
Use the product drawing to compare the profile shape, outside width and length, and compatible wall thickness before selecting a variant.
Rectangular fence post caps fit over the outside of rectangular posts and tubes. Also called external rectangular caps, post covers or rectangular ferrules, they overlap the outer sides of the profile to cover its open end.
Choose these covers by the outside dimensions of the post. The product page shows fitting measurements and available options.
Internal inserts: measure both outside dimensions of the tube and its wall thickness. For example, a 40 × 60 mm rectangular tube requires an insert listed for that outside size and a compatible wall thickness.
External covers: measure the outside width and length of the post, then check the cap dimensions. The cover fits around the outside rather than gripping the inside of the tube.
Tube inserts are not hole plugs: their ribs need sufficient tube depth to grip. They are not suitable substitutes for plugs designed to close holes in thin sheet material.
Open the relevant product page to view dimensions, colours, prices and fitting information. For sizes marked “Available to order”, email info@plasticendcaps.co.uk for price and lead time.
