Key Clamp Store ZM Tube 42.4mm - Zinc Aluminium Magnesium Coated Steel

£25.80 inc. VAT
£21.50 ex. VAT

Out of stock

Key Clamp size guide

Key Clamp 27mm
 
Our 27mm system is designed for use with 26.9mm External Diameter Tube with a 3.25mm Wall Thickness. This is commonly referred to as 3/4" (Three Quarters of an Inch) Internal Diameter pipe.

Best For:

  • Lightweight Frames
  • Small Furniture
Key Clamp 34mm
 
Our 34mm system is designed for use with 33.7mm External Diameter Tube with a 3.25mm Wall Thickness. This is commonly referred to as 1" (One Inch) Internal Diameter pipe.

Best For:

  • General Use (Light)
  • Clothing Rails
Key Clamp 42mm
 
Our 42mm system is designed for use with 42.4mm External Diameter Tube with a 3.25mm Wall Thickness. This is commonly referred to as 1.1/4" (One and Quarter Inches) Internal Diameter pipe.
 
Best For:
  • Handrailing, Light Barriers
  • Desks, Tables, Chairs
Key Clamp 48mm
 
Our 48mm system is designed for use with 48.3mm External Diameter Tube with a 3.25mm Wall Thickness. This is commonly referred to as 1.1/2" (One and Half Inches) Internal Diameter pipe, and is the standard Scaffolding size also.

Best For:

  • Pedestrian Safety
  • Heavy Handrailing
Key Clamp 60mm
 
Our 42mm system is designed for use with 60.3mm External Diameter Tube with a 3.50mm Wall Thickness. This is commonly referred to as 2" (Two Inch) Internal Diameter pipe.

Best For:

  • Ultra Heavy Handrailing
  • Heavy Duty Frames

DDA Fittings

DDA Fittings are part of a hybrid system that incorporates a mixture of 42mm and 48mm systems. We always recommend that our customers seek expert advice with DDA systems and fittings, especially if you are unaware of the differences regarding installation and design of DDA compliant handrails.

 
 
SKU
ZMTUBE-3M
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Quick overview

Key Clamp Store ZM Tube is premium quality 42.4mm key clamp tube with a zinc aluminium magnesium coating on both sides of the steel.

It is made for the places standard galvanised tube struggles: coastal sites, livestock buildings, greenhouses and anywhere damp or chemically harsh. It has a more uniform finish and self-healing properties.

Cut it, drill it and fit it like normal tube. The coating protects cut ends and drill holes as it weathers, and the tube suits every 42mm key clamp fitting we sell.

What is ZM tube?

Standard galvanised tube is protected by a layer of pure zinc. ZM tube uses a zinc coating alloyed with aluminium and magnesium, a newer coating chemistry now widely used for solar mounting, farm buildings and coastal structures.

The coating is applied to both sides of the steel strip before the tube is formed, so every length is protected inside and out. The weld seam is re-coated after welding, so there is no bare strip along the tube.

How the coating protects

Each metal in the coating does a different job:

  • Zinc corrodes first, sacrificing itself to protect the steel underneath
  • Aluminium forms a dense oxide barrier that slows down attack on the surface
  • Magnesium helps form a stable protective layer that spreads across cut edges, drill holes and scratches

Zinc aluminium magnesium coatings are well established in the steel industry to outperform pure zinc coatings of the same thickness, especially at cut edges and in salty, alkaline or ammonia-rich air.

Best for

  • Coastal and seafront handrail
  • Livestock buildings, penning frames and farm gates
  • Greenhouses, polytunnels and garden structures
  • Car parks and walkways exposed to de-icing salt
  • Jobs where you cut to size on site and don't want to touch up every end

Stronger steel, lighter tube

Key Clamp Store ZM Tube is precision welded tube to EN 10305-3, formed from S350GD high-strength steel (minimum yield 350 N/mm²) with a 3.0mm wall. It weighs about 2.9 kg/m against 3.1 kg/m for standard 42.4mm x 3.25mm galvanised tube, so it is a little easier to handle and cheaper to deliver. Precision tube is also made to a tight outside diameter, for a consistent fit in your fittings.

For safety barriers, guardrail or anything load-rated, speak to us before you order and we'll check the design with you.

Working with ZM tube

  • Cut with a cold saw, bandsaw or hacksaw and fit it just like standard tube
  • Tighten set screws to the fitting manufacturer's recommended torque
  • If you weld it, clean the weld and treat it with zinc-rich paint, as you would with any coated steel
  • The finish is a smooth, matt silver-grey that dulls to a light grey patina outdoors. This is the coating doing its job
System Size 42mm
Requires Freight Shipping No
Powder Coating Available No

Information On Key Clamps

All the clamps we sell are cross compatible.
We sell brands including: Q Clamp, Tubeclamps, Pipeclamps, Interclamp, JM Clamp and Alvin Key Clamp, amongst a few other generic Key Clamp Brands.

Some manufacturers use different part numbers.
Give us a call if you aren't sure what part you need because your original part number doesn't tally up.

And remember, all key clamps are returnable if they do not suit.
With the exception of Cut to length Handrail Tube and Modified parts, we accept returns with no questions asked.

Shipping & Delivery

We aim to deliver your items within the 48 hour timeframe quoted on checkout. During busy periods this may differ and is an estimate only.

Cut to size, bespoke, and painted orders/items may delay this.

Free Shipping is available on orders for fittings only over £50, unless we have a special offer, or we have agreed that postage will be waived.

Our logistics are taken care of via Royal Mail, Tuffnells, Interlink, DPD and UKMail.

For full shipping information click here. For Urgent orders, please email in with your requirements.

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