Yellow Key Clamp Straight Joint for 42.4mm Tube, RAL 1023 In-Line Sleeve, Size C

The yellow straight joint joins two lengths of 42.4mm tube end to end, so a yellow safety rail can run longer than one tube. It is a short cast sleeve: one tube end pushes in from each side until they meet in the middle, and each is locked by its own brass-coated grub screw. There is no welding, threading or drilling, and the joint can be placed anywhere along the rail. It is malleable cast iron finished in gloss traffic yellow powder coat, RAL 1023, made for indoor safety rails in warehouses, factories and plant rooms. The price shown is for one fitting, with a minimum order of 5.

Why use a straight joint

Rails longer than one tube. Tube comes in fixed lengths. The straight joint carries the rail on in a straight line wherever two lengths meet, so a barrier can run the full length of a walkway or machine guard.

Joints where you want them. A long tee can only join rails on top of a post. The straight joint works between posts, so you can use up offcuts and set out posts to suit the floor, not the tube lengths.

Seen from across the floor. Traffic yellow matches yellow tube and the other yellow key clamps, so the whole rail stands out to pedestrians and forklift drivers.

No hot work. Everything goes together with a hex key, with no welding, sparks or fire permit in a working building.

Where it is used

Long top and mid rails of yellow pedestrian barriers along warehouse walkways, guard rails round machinery, battery charging and plant areas, mezzanine and platform edge rails, and yellow tube frames that need a longer member than one tube.

Specifications

Know its limits

The straight joint lines up and holds two tubes, but it is not recommended as a structural joint. Place joints close to a post, within about a quarter of the span, rather than mid-way between posts, and where a rail must carry a set load, join lengths over a post with a yellow 42.4mm long tee.

Which yellow 42.4mm fitting goes where

How many do you need?

One for every point where two lengths of rail meet between posts. With 3.5 metre tube, a 10 metre rail needs two joints in each rail; a two-rail barrier of that length needs four.

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 yellow fitting is made for 33.7mm and 48.3mm tube.

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 fit the joint outdoors, paint the threaded holes and screws with matching RAL 1023 yellow once tightened, or choose the galvanised version.

Fitting and care

Cut both tube ends square and deburr them. Push one tube into each end of the joint until the ends meet in the middle, line the rail up straight and tighten both grub screws firmly with a 5/16" hex key. Check the screws after the first week and once a year, and touch up chips with RAL 1023 paint.

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.