Steel Tube Black Square - 40 mm x 2 mm
Reference: STKZ402 In stock - dispatch in 48h
How to order the target size:
- Enter the length (in cm) e.g. 100 cm
- Enter the desired quantity, e.g. 4 (now you are ordering 4 100 cm tubes)
- Click "Add to basket"
- Repeat the steps to order several tube lengths.
KLEMP Steel Square Tube black - 40x40x2 mm
- SUPPLY: 1x Steel Square Tube black - 40x40x2 mm, Size 40x40 mm, Tube, Material: Steel, Surface: Powder coated, , Colour: Black,
- HIGH QUALITY TÜV Rheinland seal of approval for design, safety, quality - the pipe connectors have been approved by TÜV - a leading, independent research institute in Europe. Optimal corrosion protection - durable, stable and universally applicable
- MULTIFUNCTIONALITY Various application possibilities. Free design of any constructions without welding or thread cutting, e.g. for shelves, railings, outlets, exhibition stand construction, play facilities, steel structures, handrails, railings, scaffolding. With pipe connectors it is easy and inexpensive to build diverse constructions. Check out our inspirations: https://pinterest.com/Tubefittings_eu/
- Size mm
- 40x40 mm
- Wall thickness
- 2 mm
- 2.371 kg/mb
- Cut to size
- Minimum length
- 50 mm
- Maximum length
- 6000 mm
- Diameter (mm)
- 40 x 40 x 2
|Average delivery times to Germany and Austria||Average delivery times to other European countries||Shipping company|
|Pipe connectors||2 to 3 working days*||3 to 5 working days*||DPD / GLS / UPS|
|Pipes up to 120 cm||3 to 5 working days*||4 to 7 working days*||DPD / GLS / UPS|
|pipes 120-220 cm||4 to 6 working days*||4 to 7 working days*||Mainfreight|
|Pipes 220-300 cm||5 to 7 working days||4 to 7 working days*||Mainfreight|
* Because it is difficult to estimate the workload in our warehouse and carriers, the delivery time is an estimate. Due to delays in some payment methods, such as bank transfer and instant bank transfer, delivery time may be extended with a few business days. We cannot guarantee the delivery times.
Are you in a hurry? Please contact us. We will see what we can do for you
For over ten years, we have been one of the most reliable partners throughout Germany and Europe when it comes to your projects with pipes and pipe connectors. You will find a comprehensive selection of various steel pipe connectors in our online store, all of which are of course TÜV-certified.
Our pipe connectors have a diameter of 21.3 mm, which are perfect for particularly strong connections with a screw load of six hundred kilograms at a torque of 40Nm. In this case, the pipe connectors are fixed by an Allen screw. In this way, any desired construction, whether sophisticated or rather simple, can be perfectly realized - the possibilities are almost endless, as the selection of different types of pipe connection makes almost anything possible, it does not matter whether you are working with aluminum pipes or galvanized steel pipes, as long as the appropriate diameter is maintained.
Take a look around our site to get a good idea of what is possible with pipe connectors.
Our comprehensive assortment offers not only steel tubes, aluminum tubes and TÜV-approved tube connectors, you will also find a wide range of hooks, clamps and swivels as well as various connectors ( tubeclamps, fittings, etc.) for your project.
We deliver directly to private and business customers through our online store.
If you have any questions or something is unclear, please do not hesitate to contact us.
Corporate clients / B2B clients
Our services are used by large companies known throughout the country and Europe.
We have great logistic capabilities.
We carry out deliveries to companies and offer wholesale prices for larger orders.
We know that as wholesalers and intermediaries you need the lowest prices and special treatment - the fastest possible delivery date and perfect quality.
That is why we have created a special offer for companies to meet these requirements.
Prices and discounts
The shopping cart in the store calculates a quantity discount depending on the number of ordered products.
You can find information about discount thresholds next to each product.
Large orders are negotiated individually (in that case please send your request to our e-mail address).
Invoices and intra-community deliveries
You will always receive an invoice from us for each order.
For business customers there is a possibility to place an order on the basis of a reverse charge. If the order is placed for a German company, for example, the VAT identification number must be provided before the order is placed (by registering the customer account).
The system will then apply a zero VAT rate.
Companies can also order from us on account (after approval) and are entitled to discounts for larger orders.
Business customers can apply for a credit purchase - an invoice with a deferred payment date. Deferred payment is available only from the second order. The first order must be paid in advance.
Please send us an e-mail. We will then perform a credit and business check.
After the approval it is possible to make a deferred payment (under certain conditions).
Do you need help with your project? Thanks to our extensive knowledge and experience, we are also happy to assist business clients in planning their projects. Would you like to order a custom advertising frame, need pipe racks in your warehouse? We are ready to help you with that.
Would you like to receive a quote for your project? Simply request a quote using the contact form or send an e-mail to email@example.com.
About the system
Why KEMP couplings?
Steel and aluminum pipes have been used as a construction element for many years. They are durable, have no sharp edges and are readily available anywhere in the world. The problem with using steel and aluminum tubing to build various structures is the issue of connections. Threaded pipe must be delivered to the job site in a precisely defined size and offers virtually no flexibility in installation. Welding requires skilled personnel, is a complicated and time-consuming process, and requires specialized equipment.
From simple protection of platforms or walkways in workplaces to safe railings in the harsh environment of harbor quays, bridges or canals. The KLEMP pipe connection system offers complete solutions that allow you to carry out such projects.
From simple protection of platforms or walkways at workplaces to safe railings in the harsh environment of harbor quays, bridges or canals. The KLEMP pipe connection system offers complete solutions that allow you to carry out such projects.
Central to the design principles of the KLEMP system is the principle of realizing a quick and easy connection of pipes. Our connectors provide the versatility to build any design. The KLEMP system consists of cast iron, galvanized connectors. We have developed a wide range of connectors in six different sizes. The hexagon socket clamping screw provides a secure and tight connection to the pipe. Stainless steel screws are available upon request.
KLEMP pipe couplings are easy to assemble and disassemble with an Allen wrench, reusable.
The pipe couplings are fixed with a hexagon socket screw. In this way, any desired design can be perfectly realized, whether it is complex or rather simple - the possibilities are almost unlimited, as the choice of different types of pipe connections means that almost anything is possible, whether you are working with aluminum or galvanized steel pipes, as long as the correct diameter is maintained.
Thanks to the simple design, our connectors allow for very quick assembly, which significantly reduces labor costs.
Discover our complete range of tube fittings and tubes in our exclusive catalog, prepared especially for you. Click on "Download" and you will receive it from us immediately.Pobierz
Choice of connectors
In our offer you will find round connectors with diameters of 21.3 mm, 26.9 mm, 33.7 mm, 42.4 mm, 48.3 mm, 60.3 mm
Why with us?
For more than ten years, we have been one of the most reliable partners in Germany and Europe when it comes to projects involving pipes and pipe fittings. In our online store you will find a wide range of different steel tube fittings.
Through our online store we deliver directly to private and business customers.
If you have any questions or uncertainties, please feel free to contact us.
Our services are used by large companies known throughout the country and Europe. We have great logistic possibilities.
Do you need help with your project? Thanks to our extensive knowledge and experience, we are happy to assist business clients in planning their projects. Do you want to order an advertising rack to order, do you need tubular racks in your warehouse? We are ready to help you with it.
Let us inspire you!
Each tube description provides outer tube diameter. In addition, another value provided for a given dimension (e.g. 42x2, 42x3) determines the thickness of the outer wall of the tube. The tube diameter reflects the outer diameter. The associated tubefittings have the same tube diameter in the product name, therefore you always know whether you have the correct size of a connector for your tube. The inner diameter of the fittings is slightly bigger, so you can easily slide them over the tubes.
Shipment of oversized loads, i.e. exceeding 120-140 cm, is associated with high transport costs that we incur on the delivery of our products. We sell goods to all EU countries, which in the case of such loads is often associated with a large distance and a non-standard size of the packaging. Weight is another criterion important especially in the case of the purchase of heavier tubes (steel). However, the most important factor affecting the cost of shipping in this case is the length of the load.
No. Due to the already assumed tolerance for cutting (2-3 mm), the adopted length possible to order was rounded to full cm
The very depth to which a tube goes in the connector depends on the tube connector used and its diameter.
The tube usually goes inside the fitting at the depth of at least 2 to 3 cm.
Usable dimensions can be found in the technical illustration of each tube connector.
The diameter of the tube provided first indicates the outer dimension, followed by the sign "x" after which stands the thickness of the tube wall.
Our steel tubes are hot-dip galvanized. This means that the steel tubes are coated with a layer of zinc, which makes them resistant to corrosion. The tubefittings are made of cast iron and are fully galvanized. As a result, they are also suitable for external use.
Tubes made of steel are stronger and stiffer. For this reason, steel tubes are often used for structures that are exposed to heavy loads and characterized by larger spans. Due to their industrial nature and resistance to scratches, steel tubes are also often used in the manufacture of furniture. Their disadvantage as compared to aluminum tubes is that steel is much heavier. Aluminium tubes are often used for advertising structures. This is to avoid adding up unnecessary load.
An aluminum tube, compared to a steel tube, is more susceptible to bending over long intervals. According to our calculations, the maximum distance between two supports (for a wall frame) or two supports (for a freestanding frame) is 150 cm. It is worth noting that steel is much heavier than aluminum. The actual weight per meter can be found in the product description. If you need additional strength calculations, we recommend consulting a constructional engineer or scaffolding specialist.
All tubes are suitable for external and internal use.
Galvanized tubes were covered with a protective layer against atmospheric factors using hot-dip galvanizing.
Aluminium tubes (black) are naturally suitable for external use as they get covered with a protective layer as soon as they come into contact with oxygen.
Black steel tubes are protected from the weather conditions by a black UV-resistant coating.
In the course of time corrosion may occur in damaged places and at the edges of the cuts.
Rust does not affect the strength of the structure and can usually be removed.
For galvanized steel tubes and raw aluminum tubes, the maximum length is 600 cm. Black tubes - 300 cm.
You can order the tubes in maximum length of 300 cm through the shopping cart at our store. If you need longer tubes, please contact us by e-mail.
We cut the tubes to the desired length. Tubes can be cut starting at a length of 5 cm. We do not charge any costs for cutting the tubes. You can select the desired length on the product page and the price will instantly show up.
The diameter of the tube you need depends on the structure, the span and the weight that the structure is to support. Tables are often made of tubes with a diameter of 42.4 mm. Coat hangers, stair railings, clothes hangers and cabinets have diameters of 26.9 mm and 33.7 mm. For large projects such as canopies and pergolas, diameters of 42.4 mm or 48.3 mm are often used. Click here for a full overview.
Our tubes are stable and made of durable material. Thanks to their high quality, our tubes are resistant to damage. However, minor scratches may appear on the external surface of the tubes.
Galvanized steel tubes are resistant to scratches and impacts, and thanks to their sturdy look, any possible scratches will not be noticeable. Aluminum is prone to scratches and can be more easily damaged due to the softness of the material. The black tubes are covered with an impact-resistant coating. Despite the coating, we recommend careful handling of the tubes as the coating is sensitive to scratches, especially with sharp objects.