Key Clamp Metal End Cap for 42.4mm Tube, Galvanised

The metal end cap closes the open end of a tube with a neat cast iron head, and is knocked in with no adhesive. Two split legs under the round head drive into the tube bore with a soft-faced mallet and grip tight, so the cap stays put without glue and is hard to pull out. Only the slightly domed head shows, sitting flush with the outside of the tube, so there is no sharp cut edge on a handrail end or the top of a frame. It is malleable cast iron with a galvanised finish for indoor and outdoor use. The price shown is for one end cap, with a minimum order of 10.

Why fitters use it

A safe, tidy tube end. The cap covers the cut edge of the tube, so handrail ends and frame tops are smooth to the hand and look finished.

Stays in without glue. The cast legs grip the inside of the tube, so the cap will not work loose or get pulled out.

Metal, not plastic. A cast iron head will not split, fade or crack like a plastic insert, and it matches the fittings around it.

Keeps dirt out. Closing the tube end stops dust and debris collecting inside.

Where it is used

Handrail and guard rail ends, the tops of posts, tube frames and barriers, gates and stands, and any open tube end that needs closing off, indoors or outdoors.

Specifications

Why close off a tube end

An open tube end has a sharp cut edge at hand height and a hollow that collects rain, leaves and litter. Water sitting inside a tube can work at the steel from within, where it cannot be seen or treated. A cap closes the end, covers the cut edge and gives the rail or post a tidy, finished look.

How many do you need?

Count every open tube end that will be on show.

Choosing the right size

Key clamps are sized by the tube's outside diameter. 42.4mm tube is often sold as 1¼" or 32mm nominal bore. Measure across the tube before ordering: this fitting will not grip 33.7mm or 48.3mm tube. The same galvanised fitting is made for 33.7mm and 48.3mm tube.

Fitting and care

Cut the tube square and remove any burr from the inside edge. Line the cap up with the tube end and tap it fully home with a soft-faced or rubber mallet until the head sits tight against the tube. It is designed as a permanent fit. Wipe clean with a damp cloth and touch up scratched galvanising with zinc-rich paint.

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 full fit-out or mixed fittings, call 01744 520 110 or email sales@industrialsuppliesco.co.uk and we will confirm availability and delivery before you order.