Yellow Key Clamp Long Tee for 48.3mm Tube, RAL 1023 Powder Coated, Size D

The yellow long tee carries a top rail over a post, and is the fitting to use where two lengths of rail meet. Its long barrel takes the rail straight through, or the ends of two rails pushed in from each side, and each is locked by its own grub screw; the post pushes up into the socket below with a third screw. It suits 48.3mm outside diameter tube and is malleable cast iron finished in gloss traffic yellow powder coat, RAL 1023, with brass-coated grub screws, for high-visibility safety rails indoors. The price shown is for one fitting, with a minimum order of 5.

Why use a long tee

Joins rail lengths over a post. Tube comes in fixed lengths, so a long run of guard rail has joints. The long tee's barrel is long enough to take two rail ends, each with its own screw, so the joint sits over a post where it is fully supported.

Seen from across the floor. Traffic yellow rails and fittings stand out against grey floors and racking, marking walkways, machine guards and edges for pedestrians and forklift drivers.

Three screws, more grip. Two screws on the barrel and one on the post socket hold the rail and post firmly, even where the rail is a single length through.

No hot work. Everything goes together with a hex key, in a working building, with no welding or damaged coating.

Where it is used

Warehouse walkway and pedestrian barrier rails, machine guards and battery charging areas, mezzanine and plant room guard rails, loading bay edge rails under cover, and yellow safety rails in factories, depots and car parks under cover.

Specifications

Long tee or short tee?

Use the long tee wherever two lengths of top rail meet over a post. Where the rail runs straight over a post in one length, the yellow 48.3mm short tee does the job at lower cost. A short tee cannot join two rails inside it.

Which yellow 48.3mm fitting goes where

How many do you need?

One long tee at every post where two top rail lengths meet. With 6 metre tube and posts at 2 metres, that is roughly one post in three.

Choosing the right size

Key clamps are sized by the tube's outside diameter. 48.3mm is standard scaffold tube, often sold as 1½" or 40mm nominal bore. Measure across the tube before ordering: this fitting will not grip 42.4mm or 60.3mm tube. The same yellow fitting is made for 33.7mm and 42.4mm tube. For outdoor use, choose the galvanised 48.3mm version.

Indoors or outdoors?

Powder coat looks best and lasts longest indoors. The brass-coated grub screws are there for their finished look and will rust outside. If you do fit the tee outdoors, coat the threaded holes and grub screws with matching RAL 1023 yellow paint once tightened. For outdoor rails that need no upkeep, choose galvanised.

Fitting and care

Push the post fully into the socket. Cut rail ends square and deburr them, then push each rail into the barrel so the two ends meet in the middle. Level the rail and tighten all three grub screws with a 5/16" hex key. Touch up chips with RAL 1023 paint. Check the screws after the first week and once a year.

Frequently asked questions

Ordering and delivery

Order 5 or more online, with Express UK Delivery to your site and same-day dispatch on orders before 2pm, Monday to Friday. For a full yellow rail kit, call 01744 520 110 or email sales@industrialsuppliesco.co.uk and we will confirm availability and delivery before you order.