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Frequently asked questions and answers
The world of hardware and screws is full of technical terms. We explain many terms and synonyms here. In addition, we answer other frequently asked questions about everything from delivery to products. Do you also have a question or tip for Wovar? Let us know at firstname.lastname@example.org.
Would you like to order Wovar screws, bolts, or hardware? We strive to deliver your order in no more than 2-5 business days throughout the entirety of Europe.
After you have placed an order, you will first receive a confirmation that your order has been processed by us. As soon as the order is shipped you will receive an email that the status has been changed to order shipped. When applicable, this email will contain the track and trace code of your order.
Yes. We provide our own brand and quality from our own stock.
Only companies in the construction, home, and garden industries are eligible for a coupon code to redeem a business discount. This is only for companies with a Wovar account that order several times a year. With a business account, you get more benefits such as a direct contact with a trained specialist, and access to a detailed order history.
With a business account, you will receive a personal discount code. You can enter this so-called coupon code as soon as you place products in your shopping cart. Business clients get an extra 15% discount on every order.
We do not currently support postpay payment methods, but we are looking to make this a possibility in the near future.
No, you can only order the Wovar brand in our webshop. You will also find Wovar at a growing number of timber merchants and gardeners. Please contact our wholesale service for retail and B2B inquiries.
We only supply premium quality, primarily from Germany and renowned factories in Taiwan and China.
We deliver to all countries in the EU. Check our delivery page to see whether we have a separate website for your country, or whether you can order via wovar.com.
Use a special wood drill bit, hardwood drill bit, or auger drill bit for drilling in wood. For hardwood in particular, never drill in one go, but empty the drill every approximately 2 cm by removing it from the drill hole and removing the wood fibres. Is your drill starting to smoke? Then you are drilling too deep in 1 go. You run the risk of breaking the drill bit. If necessary, use olive oil so that wood fibres slide off your wood drill more easily.
Push only lightly on your drill, otherwise you risk breaking your drill bit, especially with thin 2 to 4 mm drill bits. Have a steady hand, so you drill straight. Also make sure you have a good drill, preferably 12 volts cordless or a drill with cord. Put it on the drill setting.
Use our special auger drill bit for this. These drill bits are available with a length up to 620 mm. As with all our hardwood drill bits, it is important that the drill does not get too hot. Drill about 2 cm into the wood and remove the drill again, so the sawdust can be cleared away. Always let the drill do the work. Wovar auger bits have a special drill point. This pulls the drill itself through the wood, as it were.
We recommend always pre-drilling wafer head screws. This greatly simplifies driving in the screws and ensures that the head of the screw is not damaged. You will also see that the screw is driven straight into the wood. Wafer head screws 8 mm thick must be pre-drilled with a 6.0 mm hardwood drill bit, or for longer wood construction screws a 6.0 mm auger drill bit. Always opt for a drill bit that is 2 mm thinner than the screw, so the screw can still bite into wood and create a solid connection.
We offer pergola brackets for 7 x 7, 9 x 9, 12 x 12, 15 x 15, and 20 x 20 cm posts. You can also use these for posts that are slightly smaller than the indicated size. Use our angle brackets for other post thicknesses. For each pergola corner bracket, we indicate which square wooden beams/posts you can use. View all pergola corner brackets here.
The number of mm thread of our coach bolts is shown on the product photo. The number of mm of thread of our galvanized coach bolts varies. Stainless steel coach bolts are always fully threaded.
Use the following rule of thumb: coach bolt thickness + 1 mm = drill bit thickness. For example, if you have a coach bolt M10, use an 11 mm drill bit for pre-drilling. In addition to regular wood drill bits and hardwood drill bits, you can also opt for our auger drill bits. These drills are useful if you want to drill deeper than 4 cm. Using a rubber mallet, drive the carriage bolt through the drill hole.
A coach bolt has a square underneath the head, so it remains stuck in the wood and can no longer rotate. You tap the head with a rubber mallet. As a result, the square part clamps into the wood and the bolt does not turn while tightening the nut.
A coach bolt is a threaded bolt with a semicircular head with a square section underneath. Coach bolts are also known as carriage bolts. Nuts and washers are always included with Wovar's carriage bolts. It is not possible to use coach bolts without nuts. The square section underneath the head ensures that the bolt does not rotate when the nut is tightened. Carriage bolts are suitable for metal and wood. When joining metal, the square part must fit exactly into a square hole. With wood connections, drive the head into the wood with a rubber mallet.
Wovar supplies carriage bolts in galvanized steel, stainless steel, and in black. All coach bolts are supplied with nut and washer at Wovar! The thicknesses vary from M6 to M12. The lengths are available from 30 mm to 300 mm.
Yes, all Wovar's coach bolts include a hex nut and regular washer! If you prefer to use lock nuts or a penny washer, shakeproof washer, or spring washer, you will have to order them separately.
Self-tapping bolts are fully threaded and have a hex head. Carriage bolts have threads only at the end and usually have a round head.
Generally speaking, you do not have to pre-drill self-drilling screws. Sometimes it is useful to drill a very small hole in metal with a 2 mm drill so that your self-tapping screw is mounted exactly in the desired location. Self-tapping screws with a torx head are easier to drive in than those with a cross head. In addition to these self-tapping screws, Wovar also supplies self-tapping screws with a hexagonal head drive. These have an EPDM ring. This makes them suitable for tile sheets or corrugated sheets.
Tile supports have 4 raised flanges at the top in the shape of a cross, so that 4 concrete tiles clamp in here. Decking supports have only 1 flange, to which you attach the wooden lower beam of your terrace.
These screws are both equally strong. The “old-fashioned” Yellow Galvanized is often used with Larch Douglas wood because of its colour. More and more customers are switching to grey galvanized, since wood greys as it ages. Yellow galvanized is slightly more protected against oxidation, but this difference compared to grey galvanized is minimal.
Wovar is a made-up name for our premium brand. The letters are not an acronym of anything.
A carabiner is a hook with a hinged gate. Carabiners are available in galvanized steel and stainless steel. Carabiners are used for quick connections. They are also popular in mountaineering.
In addition to the traditional carabiners, as shown on the right, we offer locking carabiners for extra safety. Wovar delivers traditional carabiners in various sizes, made of galvanized steel and stainless steel.
This is a very strong type of steel with less nickel. Because there is less nickel in this type of steel, it is much harder and therefore stronger. However, stainless steel 410 can oxidize slightly.
It is always recommended to use our special decking screws stainless steel 410 screws for mounting decking. These are much harder than stainless steel A2 screws. This allows them to absorb the pressure of the wood much better.
Galvanized screws can oxidize outdoors. In other words, they are susceptible to rusting Our A4 and 410 stainless steel screws are not vulnerable to oxidation, and are just as strong as galvanized screws. Make sure you are using the correct bits so that the heads of the screws are not damaged. Otherwise, our 410 stainless steel screws can also oxidize. Wovar also supplies a wide range of A2 stainless steel screws. These do not oxidize, but are less strong than our 410 stainless steel or galvanized screws. This is because A2 stainless steel is a softer type of steel. We recommend to always use A4 or 410 stainless steel screws.
Pre-drilling is always recommended with our wafer head screws. This ensures that the screws are processed more easily and are driven straight into the wood. You pre-drill our 8 mm thick wafer head screws with a 6 mm thick hardwood drill bit. For wafer head screws with a length of 140 mm or longer, use our 6 mm auger drill bit. Always opt for a drill bit that is 2 mm thinner than the screw, so the screw can still bite into wood and create a solid connection.
Choosing the right screws for a deck is very important. Deck screws should be able to absorb the movement of wood due to wind and weather. Cheap stainless steel screws are not suitable for this. We recommend using screws with a minimum thickness of 5 mm. It is not without reason that we have made a name for ourselves with our Wovar decking screws 5 x 50 mm 410 stainless steel with torx drive, milling ribs and cutting point. These high-quality stainless steel decking screws are suitable for 19, 20, 21, 25 and 28 mm thick decking boards.
Yes, we supply screws in black, white, yellow, and grey. Often used for facade panels, black fence boards, and black walls or roofs. Always use 2 screws per board/beam intersection with gunwale planks, and never stack the parts tightly together.
Full-thread screws are widely used for metal-to-wood connections. Because the screw is fully threaded, it is strongly anchored in the wood. This, in turn, means the metal is firmly attached. For wood-to-wood connections, it is better to choose partially threaded screws. If you fasten wood to wood with full-thread screws, there will be space between the wooden parts, and they will not be pulled tightly against each other. This does not happen with partially threaded screws.
A wafer head screw is the successor to the traditional coach screw. These screws are basically wood construction screws that are commonly used when building a canopy. For example, you can easily join together slanted beams, braces, or 2 thick 15 x 15 cm beams.
A wafer head screw has a wide head of approximately 20 mm wide. This ensures a large bearing surface and a high clamping range. This makes the screw suitable for heavy building constructions. A Torx 40 drive is incorporated in the head. This ensures that you can drive in the screws super fast compared to coach screws with a hexagon head.
A washer head screw is also called a wafer head screw or wood construction screw. This screw is the successor to the coach screw. The difference is that the washer head screws have a torx 40 drive, while the coach screws have a hexagon head. Screws with a torx drive are faster to process in wood. The head of Wovar washer head screws is approximately 20 mm wide and is widely used for heavy building structures such as carports.
The name says it all, this is a screw developed specifically for fastening decking boards. Our 410 stainless steel decking screws are specially hardened and do not oxidize. Normal A2 stainless steel screws are less strong and cannot handle the movement of decking boards. This is no problem with the 410 stainless steel decking screws.
In addition to strength, decking screws also have a nice countersunk head with milling ribs underneath. This causes the head to sit flush with the decking boards, which results in a beautiful finish. The extra deep, torx 25 drive ensures that the screws are not damaged when driving them in. Due to the sharp cutting point / drill point, pre-drilling is not always necessary, and the wood does not split. The shank ribs above the screw thread reduce screw-in resistance. This allows you to drive in more decking screws per battery charge.
Hardened screws are made more resilient in a special machine.
A corrugated sheet screw is, as the name suggests, a screw to fasten corrugated sheets. The corrugated sheet screws from Wovar are made of A2 stainless steel and have an EPDM ring. This prevents the corrugated sheets from rusting and ensures a watertight installation. The corrugated sheet screws can only be used for attaching corrugated sheets to wood.
Corrugated sheet screws are very popular and available in sizes 4.5 x 50 mm up to and including 4.5 x 100 mm.
Milling ribs are the ridges underneath the head of the screw. They ensure that the head sinks nicely into the wood. This results in a beautiful finish. The image shows exactly what Wovar means by milling ribs.
A cutting point or tip of our Wovar screws is a kind of saw cut that interrupts the screw thread. This is also known as a drill point. The advantage of a cutting point is that pre-drilling in softwood becomes unnecessary. Sometimes it is not even necessary to pre-drill into hardwood thanks to the cutting tip. A cutting point also ensures that thin sheet material does not split. The image shows what a cutting point looks like.
A torx drive is a hexagonal drive for screws. Torx drive (TX) provides extra grip, so your machine does not slip. It also ensures optimal power transmission while driving in your screw. With torx drives, there is a chance that your screw will be damaged during screwing in. Wovar supplies torx screws with a bit of TX10, TX20, TX25, TX30 and TX40.
Professionals, such as construction workers and carpenters, often use screws with torx drives. Wovar supplies free torx bits with every box of galvanized chipboard screws, galvanized garden screws and decking screws A4 stainless steel.
The image below shows a torx bit and drive.
Pozidrive is a crosshead drive where a second, smaller cross is added to the standard crosshead. This creates a kind of star-shaped incision. The second cross generates a better power transmission than a normal cross-head drive. Our chipboard screws with pozidrive drive are ideal for home use.
Below is an image of a pozidrive head with the corresponding bit.
A partial thread screw is a screw that is partially threaded. Partial-thread screws are very suitable for wood-to-wood connections. Because the screw is not fully threaded, it pulls the wooden elements tightly against each other. When using a full-thread screw for wood-on-wood connections, there will be space between the different pieces of wood.
Wovar supplies very strong partial thread screws galvanized torx.
A drill screw is quite simply a self-tapping screw. A drill screw has a drill head that can be screwed into metal such as aluminium or galvanized steel without pre-drilling. A drill screw is also called a self-tapping screw. Available at Wovar in galvanized and stainless steel in various lengths.
Flat hinges are completely straight. Cranked hinges have a small kink. This bend causes your door to be flush with the post to which you have attached your hinge hook. With offset hinges, you can mount the hinges on the back of the post and have the hinges in view at the front of your door or gate.
Cranked hinges have a bend of about 2 cm. This ensures that your door fits exactly in the door frame. With straight hinges, your door extends slightly in front of the door frame.
The first mounting hole on a gate hinge is square, so you can firmly anchor the hinge with a coach bolt. Coach bolts, also known as carriage bolts, have a square section behind the head. This fits exactly in the square hole, ensuring the hinge does not move from its place. It also has an anti-burglary function. By mounting carriage bolts in 2 different ways, it is impossible to unscrew them from 1 hole.
The bend of cranked hinges is 19 mm. This means the door sits back 19 mm. If you choose a regular hinge hook, the back of the hinge will be flush with the back of the hinge hook. For example, if you place the hinge hook on a table, and slide a cranked hinge onto the hook, the hinge will lie flat on the table, just like the hinge hook.
A strap hinge is a long hinge with which you mount fence doors, garden doors, garden gates on garden fences. The strap hinge is the band part of a hook and band hinge, which is our standard gate hinge. Wovar supplies gate hinges in galvanized steel and in black. Strap hinges have a high carrying capacity. This makes them very suitable for heavy doors. A strap hinge should always be combined with a hinge hook You screw the hinge hook to the post, and the hinge slides over the thumb of the hinge hook as shown in the picture.
A strap hinge exists in roughly 3 variants. There are straight hinges, cranked hinges, and offset hinges. Which one you choose depends on the desired door position.
Wovar supplies coach screws in different sizes. To choose the correct drill bit size to pre-drill the coach screws, take the thickness of the coach screw and subtract 2 mm. You now have the correct drill bit size to pre-drill the coach screw.
Take an M8 coach screw as an example. This one is 8 mm thick. From this, you subtract 2 mm, leaving 6 mm. So you should pick a 6 mm wood drill bit.
A coach screw is a strong screw with a hexagon head drive, a mix between a bolt and a screw. Coach screws are available in stainless steel and galvanized steel. Because thicker coach screws are very strong, they are often used for heavy wooden structures. Due to the hexagon head, you must process the coach screws with a ring, open-ended or socket wrench. The hexagonal head makes it possible to tighten the bolts extra firmly. It is recommended to pre-drill coach screws.
A coach screw has a point through which it is screwed directly into the wood. It is the only bolt that does not require the use of nuts.
Beam brackets are narrow and suitable for hanging installation on horizontal wooden girders. Beam brackets are available with flange and without flange. Beam brackets with flange are bricked in when building a stone wall. Beam brackets without flange are used with already standing walls. The advantage of beam supports is that they are narrow, and it is therefore possible to place a beam tightly along a wall.
Joist hangers have no flange and are wide. This makes it impossible to place a beam along a wall. Joist hangers are mounted against a horizontal beam, allowing you to install a beam perpendicularly. A beam bracket without flange is in fact a narrow joist hanger. Joist hangers are stronger than beam supports. They have been tested and provided with a CE marking. For each joist hanger, the carrying capacity is indicated.
Our stainless steel screws for oak & garapa wood have been specially developed for wood types containing tannic acid. This also includes red cedar. These screws have a special protective coating so that tannic acids do not affect the screw. You also do not have to worry that the coating will be damaged when driving in the screws. The coating is self-healing and can easily repair minor damage.
A screw nail is a wire nail with a twisted shank. Wovar supplies round head screw nails in A2 stainless steel, which are widely used for mounting facade cladding. The twisted shank easily absorbs the movement of hardwood and softwood. This keeps the nail firmly in the wood and prevents your facade cladding from bulging. If you were to use straight nails, there is a good chance that they will be pulled out of the wood.
A frame fixing is also called a hammer fixing. Frame fixings are used to mount beams to a wall or secure wooden frames. The advantage of the frame fixings is that they have a Torx 40 drive. This makes it possible to remove the frame fixings again after they have been hammered into the wall. Wovar frame fixings have an extra thick core. This gives the frame fixings an even higher load-bearing capacity!
Which size should I choose?
All Wovar frame fixings are 10 mm thick. The lengths vary from 100 to 180 mm. You choose the right length by multiplying the thickness of your beam by 2. So you mount a beam of 50 mm thick with frame fixings 10 x 100 mm.
How do I mount a beam to the wall using the Wovar frame fixings?
First, you determine at which points of the beam you want to attach frame fixings. Divide the fixings evenly over the beam, with a distance of approximately 50 cm between the individual fasteners. Drill all the way through the beam with an 11 mm hardwood drill bit. Then hold the bar in the desired position. Use a 12 mm thick SDS-plus hammer drill bit to pre-drill the frame fixings in the right place. For sturdiness, it is important that the frame fixing is nicely anchored in the solid stone.
With a 50 mm thick beam, a frame fixing 10x100 mm is inserted into the wall for 50 mm. Add 10 mm to this. In total, you drill a hole with a drilling depth of 60 mm.
A hammer fixing is a set consisting of a wall plug with a screw. You can hammer this screw into the fixing with a hammer, hence the name hammer fixing. At Wovar you will find the hammer fixings under frame fixings.