Key Clamp Base Plates and Flanges for Tubes | 33.7 mm

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Wall Flange 33.7 mm
Standard Flange for Wall or Floor (33.7 mm / Size 6)
£4.45 Incl VAT £4.94
£3.71 Excl VAT £4.12
Save £0.79
Railing Base Flange 33.7 mm
Railing Base Flange (33.7 mm / Size 6)
£7.13 Incl VAT £7.92
£5.94 Excl VAT £6.60
Save £2.03
Ground Support 33.7 mm
Ground Socket (33.7 mm / Size 6)
£18.28 Incl VAT £20.30
£15.23 Excl VAT £16.92

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33.7 mm

Why Keyclampshop?

Trustmark & Reviews

Trustmark & Reviews

Key clamp base plates are essential fittings used to stabilise tube structures in a wide range of projects. These flat, round or oval steel plates attach to the end of a tube and allow the construction to be securely fixed to the floor or wall. Whether you're building furniture, safety railings or industrial frames, base plates provide a strong and reliable foundation, both indoors and outdoors.

Round and Oval Base Plates

Also known as a floor flange or base flange, the key clamp plates in round or oval ensure maximum support when fixing tubes to solid surfaces. These plates are made from galvanised steel like all of our key clamps, making them resistant to corrosion, moisture, and other weather conditions, ideal for both indoor and outdoor use. Thanks to their wide flange, they offer excellent stability and strength.

Round base plates are also often called wall flanges, especially when used to mount tubes directly to a wall. These key clamp feet are available in various sizes to match different tube diameters, such as 33.7 mm, 42.4 mm, and 48.3 mm.

Frequently Asked Questions

What is a key clamp base plate used for?

It’s used to stabilise tube constructions and prevent movement or sinking. It also makes it possible to securely fix the structure to a solid surface.

What types of clamp plates are available?

We offer round and oval base plates, suitable for applications like furniture, railings, and industrial structures.

How do I install a key clamp base plate?

The flange is fixed to the end of the tube with an Allen key. The plate itself is then screwed to the surface using appropriate fixings to ensure maximum stability.

Are clamp plates suitable for outdoor use?

Yes, our galvanised base plates are protected against rust and corrosion, making them ideal for use outside.

What sizes are available?

Key clamp base plates come in multiple sizes to match common tube diameters, including 33.7 mm, 42.4 mm, and 48.3 mm.

Applications

Our key clamp base plates are widely used in DIY and professional projects, from sturdy workbenches and custom-built tables to outdoor pergolas and industrial safety railings. Paired with elbow fittings or t joints, they provide both vertical support and secure ground fixation.

They’re also common in industrial safety railings, balustrades, and garden structures like pergolas. Wherever a stable, fixed connection to the ground or wall is needed, a base plate is the solution.

Need help choosing the right base plate for your project? Contact our key clamp experts, we’re happy to advise you.