Key Clamp Offset Crossover Reducer 90 Degrees, 42.4mm to 33.7mm Tube, Galvanised

The offset crossover reducer joins a 42.4mm tube and a 33.7mm tube where they cross at 90°, side by side. One barrel takes the 42.4mm tube and the other, smaller barrel takes the 33.7mm tube, with their centre lines 43mm apart. Each tube is locked by its own grub screw, and both tubes run straight through, so neither has to be cut at the joint. It is typically used in racking, shelving and frames where a lighter rail crosses a heavier upright. It is malleable cast iron with a galvanised finish for indoor and outdoor use. The price shown is for one fitting, with a minimum order of 10.

Why use a crossover reducer

Two tube sizes in one joint. Frames often use heavier tube for uprights and lighter tube for rails and shelf bearers. This fitting joins the two directly, with no packing or sleeves.

Both tubes run through. Neither tube ends in the fitting, so it can sit anywhere along both, and rails can carry on past each upright.

Simple to adjust. Loosen a grub screw and the fitting slides along its tube, so shelf and rail heights can be changed later with a hex key.

Galvanised for indoors and out. The zinc coating protects the iron in stores, workshops and outdoor frames.

Where it is used

Racking and shelving frames, workbenches and stillages, display and exhibition frames, garden and allotment structures, and any tube frame where a 33.7mm tube crosses a 42.4mm tube at right angles.

Specifications

Know its limits

The tubes cross at 90° and pass each other; they cannot be joined end to end in this fitting. It is for crossing joints in frames, not for main structural connections carrying heavy loads. No load rating is published; for racking or frames that must carry a set load, ask a structural engineer to check the design.

Which crossover do you need?

How many do you need?

One at every point where a 33.7mm tube crosses a 42.4mm tube. A shelf bearer crossing two uprights needs two; a four-upright shelf level with bearers front and back needs four.

Choosing the right size

Key clamps are sized by the tube's outside diameter. Measure both tubes before ordering: this fitting needs one 42.4mm tube (often sold as 1¼" or 32mm nominal bore) and one 33.7mm tube (often sold as 1" or 25mm nominal bore). If both tubes are the same size, use a standard offset crossover.

Fitting and care

Slide the fitting onto the 42.4mm tube and feed the 33.7mm tube through the small barrel. Set the height and position, then tighten both grub screws firmly with a hex key. Check the screws after the first week and once a year after that. 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 racking or frame kit, call 01744 520 110 or email sales@industrialsuppliesco.co.uk and we will confirm availability and delivery before you order.