Frequently asked questions
The colours are refering to our colour coding system, which shows where the screw in intended to be used.
Green = Outdoor
Orange = Protected outdoor
Blue = Indoor
Yellow = Stainless steel
NKT Fasteners products are sold through resellers across the Nordics and UK. Find your closest reseller on our resellers-page
There are lots of things that differentiate our various screws! We have long expereinces in developing and optimizing each screw based on its specific application and area of usage. The functions and apearence of a screw have been carefully chosen and tested to create optimal conditions for a smooth and strong installation. Read more about our different screws on our website.
There are a total of five corrosivity classes, C1-C5, where C5 is the highest corrosivity class. For outdoor assembling, C4 or C5 is recommended depending on the application, type of wood and the surrounding environment. Our outdoor and stainless A2 screws both have a C4 classification, while our stainless A4 screw has the highest corrosion classification C5, for tougher climates and more exposed environments.
NKT Fasteners is constantly working on solutions to reduce our climate impact. Among other things, our products are packed in 100% recyclable cardboard boxes made of FSC-certified cardboard and our local Danish facilities are fully powered by renewable electricity. NKT Fasteners is also part of a large global organization where issues within social sustainability such as diversity and inclusion are given high priority.
NKT is originally a Danish abbreviation of Nordisk Kabel- & Trådfabrik, which was founded back in 1899 in Denmark. Later, the company was divided into two different parts, where the part that manufactures screws added "Fasteners". And just like that, NKT Fasteners was created.
Deck Pro fits all standard board widths on the market, the same tool fits boards from 85-150 mm in width. For boards over 150 mm in width, 3 attachment points are generally recommended, where we instead recommend a top-mounted solution.
Deck Pro screws have the dimension 4.5x60 and fit all boards from 18-32 mm in thickness. However, it may not be installed in hardwood or other types of exotic wood-types.
No, Deck Pro is recommended for most types of wood, but not for hard wood. When building decks with hard wood, you should instead use one of our top-mounted decking screws with a thickness of at least 5 mm, such as Deck+ HE or SPUN+ SUH.
When mounting your screws with the Deck Pro tool, the placement of the screw is optimized to be as far down on the edge as possible, without compromising with the strength and durability of the installation. If you look closely at an individually mounted screw you will be able to get a glimpse of the screw hole. However, if you look at the decking from a normal distance the impression is that the screws are "invisible".
The Deck Pro screw is developed with a cylindrical head that closes the hole during installation, this will prevent water from penetrating into the wood.
The screw has a reduced drill tip that provides a quick start in tricky angles, this means that the screw can be installed without the tool if needed.
When buying the Deck Pro tool, distance blocks are included that allows the distance between the boards to be adjusted, from 3 mm up to 7.5 mm. The tool comes pre-mounted with a 6 mm distance in accordance with building standards but can easily be changed if a different distance is desired.
The Deck Pro is a system solution where screws and bits that are specially developed with the tool. Generally, other hidden screws on the market have too large heads and will therefore not fit our tool. However, our Deck Pro screw works well with other tools on the market as well.
The Deck Pro tool has a unique adjustment function which means that one and the same tool can be easily adapted to all common deck widths on the market, from 85-150 mm. Other tools on the market today require two different tools, one for thinner and one for wider boards. The Deck pro handle is developed with a focus on optimization and ergonomics and can withstand up to 100 kg of direct load. Many also feel that the Deck Pro is more stable and stands more stable against the board.
General building standards recommend 6 mm distance between each decking board, taking into account that the wood can expand or contract up to 5 mm depending on current prevailing humidity. To avoid larger gaps in the wood when mounting in damp conditions, Deck Pro is possible to adapt into a minimum distance of 3 mm. However, it is important to remember that smaller distances between the boards lead to an increased risk of boards colliding. We always recommend to follow national building standards.
For a hidden assembly of a board that lies against the wall there is a smart little trick. Pre-assemble the board onto a shorter support beam using the Deck Pro tool. Further, insert the pre-assembled board against the wall and then attach the support beam to the primary beam.
The number of decking screws needed per square meter depends on the width of the decking board.
Below is an indication based on the three most common decking board widths:
95 mm: 40 screws/square meter
120 mm: 32 screws/square meter
145mm: 26 screws/square meter
The number of screws needed for a decking varies with the size of the deck and the width of each board. Below is an indication based on the three most common decking board widths per m2. The sum is then multiplied by the total number of square meters.
95 mm: 40 screws/square meter
120 mm: 32 screws/square meter
145mm: 26 screws/square meter
When building a deck that should last for many years, there are a few things that are important to consider when choosing your decking screw. On our decking page there is a step-by-step guide that will guide you with the correct screw for your project.
The length of the screw depends on the thickness of the decking board. To achieve a secure and strong installation, "the neck" of the screw should be at least as long as the thickness of the decking board, i.e. the plain part between the head of the screw and the start of the thread.
A rule of thumb is to choose a screw whose total length is about twice as long as the thickness of the board for optimal strength and durability.
Pressure-treated wood is one of the most common types of wood used for decking. Here, any of NKT Fasteners' decking screws can be used.
Keep in mind that the environment should also be taken into consideration when choosing the right screw. Visit our decking page for more information.
Please visit our decking page where we have collected our best tips when choosing your decking screw.
Stainless screws are recommended when mounted in costal areas or other exposed areas such as close to a pool or by a lake. Stainless screws are also recommended in environments frequently being exposed to different types of chemicals, as well as large decks with bigger movement in the construction.
These are terminology for the quality of the stainless steel. A2 is included under the second-highest corrosivity class C4, while A4 is also acid-resistant and belongs to the highest corrosivity class C5. The more aggressive the environment, the higher classification is required.
Find your closest reseller:
NKT Fasteners are sold via builders merchants all over the UK & Nordics. Find your closest reseller!
