Kee Systems Shop

Square Fittings

Components for creating signage frames, industrial style furniture & shop display frames.

More information about our Square Fittings

The Square Fittings are designed to suit 40×40 mm or 25×25 mm square tubing.

Both components and tubing are available in galvanised or matt black e-coating RAL9005 however, we recommend e-coating for indoor applications only.

This range is ideal for creating signage frames, industrial style furniture, storage racking & shop display frames, etc. However, they should not be used in safety applications such as handrails & guardrails.

Square Fittings brochure

Square Fittings dimensional datasheet S25

Square Fittings dimensional datasheet S40

Square Fittings - Quality and Aesthetic Advantages

Kee Systems offers square fittings that are of the same high quality as round connectors.

These fittings provide the ability to connect pipes to create strong structures with a high level of stability and impressive aesthetic appeal.

Structures made with square tube fittings have a unique design that can be incorporated into any room, offering excellent value for money.

The square shape of these fittings makes them ideal for assembling structures with flat tops, such as tables or shelves.

Fittings for Square Pipes with Clamp Screws

Our store offers a variety of square tube fittings that allow for the construction of most structures using square steel pipes. These fittings feature an allen screw for quick and easy installation, requiring no special qualifications. Simply tighten the screw to securely attach the square joint to the pipe, creating a solid structure.

Square connectors are part of the Kee systems range , ensuring compatibility, easy connection, and the ability to disassemble for future use.

Advantages of Kee Systems fittings

Our fittings are designed for quick and easy connection of steel and aluminium pipes to create structures of any complexity.

Unlike traditional joining techniques, such as threaded connections or welded joints, the Kee Klamp key clamp fittings allows for flexible assembly without the need for specialized equipment or qualified personnel.

The couplings for square tubes in the Kee Klamp system,  feature sockets for easy insertion and locking of the tube end with a set screw, providing a strong and stable connection that can be easily disassembled.

Square Fittings in our Store

Our galvanized square connectors come in two sizes: 25x25mm and 40x40mm, with various types available for different functions. Each type is designed for optimal performance and durability.

Materials and Galvanization

All Kee Systems square joints are made using modern casting technology, with high-quality materials and rigorous testing processes. The fittings are heat treated for improved ductility and shot blasted for a smooth surface finish. The fittings are then hot-dip galvanized through a meticulous process to ensure high mechanical resistance and aesthetic appearance.

TÜV Certificate

The square connectors  are TÜV-certified, indicating that they meet quality standards and are safe and environmentally friendly.

Shop Products



Kee Systems is pleased to offer discounts on tubes and fittings on the following amounts (ex VAT)

All discounts are automatically applied at checkout.

Bulk discount available up to 10%

5% off orders over £1000 + VAT

10% off orders over £ 2500 + VAT

Free Standard Delivery

On all tubes and fittings orders over £100 + VAT to the UK

If you have any queries regarding our discounts, please contact us at

Unlimited Free Cutting

There is no charge for cutting your material for you

How do I tell you my cutting instructions?

Just complete your order online and add your instructions to the order notes box on the shopping cart page when prompted.

Don’t forget to tell us if you need your offcuts!

What is used to cut lengths and sheets?

We cut lengths on a band saw.