Black Aluminium Fence Post Cap, 90mm Square, Pyramid Top, RAL 9005

A black pyramid cap that finishes the top of an aluminium fence post and keeps the weather out of it. If you are putting up a run of composite fencing or gate boards on aluminium posts, an open post top lets rain and debris straight down the inside. This cap is 90mm square across the top, rises to a shallow pyramid 30mm high, and is powder coated black RAL 9005 to match a black post. It has a short skirt that goes into the post, and a hole in the side for a fixing screw. The price shown is for one cap, with a minimum order of 10, so you can cap a whole fence line in one go.

Important: this cap is black. If your posts are anthracite grey, choose the anthracite cap instead, linked in the table below.

Why this cap works

It closes the post top. The skirt drops into the open end of the post, so the cap sits with its flange resting on the top. Water runs off the four sloping faces rather than into the section, which is what keeps the inside of the post cleaner for longer.

A pyramid top sheds water. The shallow slope, 30mm from corner to peak, leaves no flat area for puddles or leaves to sit on. A flat lid would collect both.

A finish that matches the post. The cap is powder coated black RAL 9005, the same finish as our black aluminium fence post, so the post and the cap read as one piece from the ground.

It is made for aluminium fence posts used with composite boards. In short: it closes the post top, sheds water and matches a black post.

Where it is used

On the top of every aluminium post in a composite fence or gate frame: boundary fences around yards and car parks, screening around bin stores and plant, and the posts either side of a pedestrian or vehicle gate. It also suits the end posts of a run, where an uncapped top is most exposed.

Specifications

Choosing the right cap

This cap is sized for the aluminium fence post used with composite boards, which we sell in black and in anthracite grey. Check that your post is one of those before ordering, because a cap is a close fit and a post of another section will not take it. The colour is the only difference between the two caps, so pick the one that matches the post.

The posts themselves are here: black aluminium fence post, 2350mm and anthracite aluminium fence post, 2350mm.

Fitting and care

Make sure the top of the post is clean and free of swarf, then press the cap on until the flange sits flat on the post. Drive one screw through the hole in the side of the cap into the post wall so the cap cannot be lifted off by wind or by hand. Use a screw suited to aluminium and keep it snug rather than overtightened, because the wall of the cap is 1.8mm thick.

The powder coat needs no routine care. Wash it with warm water and a little detergent when it gets dirty, and clear any leaves from the top of the post now and then. Touch up any chip with a suitable paint to keep the aluminium covered.

Frequently asked questions

Ordering and delivery

Order 10 or more online, with Express UK Delivery to your site and same-day dispatch on orders before 2pm, Monday to Friday. For a larger job, call 01744 520 110 or email sales@industrialsuppliesco.co.uk and we will confirm availability and delivery before you order.