Black Key Clamp Metal End Cap for 33.7mm Tube, Indoor Use

A black cast iron end cap that closes off the open end of a 33.7mm tube with a neat, rounded finish. 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. The black electrophoretic finish matches black key clamp tube and fittings for indoor work. 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

The ends of black tube handrails on stairs, ramps and corridors, the tops of uprights on shop display frames, clothes rails and shelving, café and bar foot rails, room divider frames and indoor guardrail posts.

Specifications

Why close off a tube end

An open tube end has a sharp cut edge at hand height and a hollow that gathers dust and litter. On a shop display or a piece of furniture it is also the first thing the eye goes to. A cap closes the end, covers the cut edge and gives the frame 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. 33.7mm tube is often sold as 1" or 25mm nominal bore. Measure across the tube before ordering: this fitting will not grip 26.9mm or 42.4mm tube. The same black fitting is made for 26.9mm tube. For outdoor use, choose the galvanised 33.7mm version.

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 chips with black paint. The electrophoretic coat is for indoor use only.

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.