Black Key Clamp Slide-Over Locking Ring for 26.9mm Tube, Support Collar, Indoor, Size A

A plain black collar that clamps to a 26.9mm tube with one grub screw, to stop another fitting sliding down it or to carry extra weight. Slide it onto the tube, push it up tight under the fitting above, and tighten the screw. It is the simple fix for a shelf, clothes rail or display arm that creeps down a black tube upright under load. The black electrophoretic finish matches black key clamp tube and fittings for shop, café and home fit-outs indoors. The price shown is for one ring, with a minimum order of 10.

Why use a locking ring

A second grip under a loaded fitting. Every key clamp holds by its grub screw biting into the tube. On shelving and rails carrying heavy stock, that load can be more than one screw should hold. A locking ring clamped directly underneath takes the extra weight, so the fitting above cannot slip.

Stops turning fittings from sliding. Swivels and collars left loose to rotate can still drop down the tube; a ring under them keeps them at height.

Neat and black. A plain black collar looks like part of the frame, not a repair.

Low cost and quick. One screw, no drilling, and it can be added to a frame at any time, as long as you can slide it on from the tube end.

Where it is used

Black tube shelving in shops, cafés and homes, clothes and display rails carrying heavy stock, room divider frames, workbench and desk frames, and as an end stop on a horizontal tube.

Specifications

How many do you need?

One ring under each fitting that carries a heavy load. On a shelving unit, that is one per shelf fitting on each upright.

Choosing the right size

This ring fits tube of 26.9mm outside diameter, often sold as 3/4" or 20mm nominal bore. Measure across the tube before ordering. For 33.7mm black tube, use the black locking ring for 33.7mm tube. For outdoor frames, use the galvanised 26.9mm locking ring.

For the rest of a black 26.9mm frame, see the matching 90° elbow, oval base flange and metal end cap.

Fitting and care

Slide the ring onto the tube from its end before fitting anything that blocks it. Push it up hard against the underside of the fitting it supports, then tighten the grub screw firmly with a hex key until it bites into the tube. Check it after loading the frame for the first time and again after a week. 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.