Wood Screws DIN 571 – Hex Head Coach Screws
Wood Screws DIN 571 – Strong Hex Head Coach Screws for Timber Fixings
Looking for DIN 571 wood screws or hex head coach screws? Intergard supplies high-quality hexagon head wood screws for secure timber connections, fixing wooden beams, installing fence components and attaching suitable brackets to timber. Their coarse wood thread provides a firm grip, while the hexagonal head allows controlled tightening with a spanner or socket.
Choose from galvanized steel and stainless steel in a wide range of diameters and lengths, including 6mm, 8mm and 10mm. Ideal for professional construction, joinery and DIY. All prices are per 100 screws. Trade and wholesale enquiries welcome.
DIN 571 Wood Screws – Heavy-Duty Hexagon Head Coach Screws
DIN 571 wood screws, commonly known as coach screws or hex head wood screws in the UK, are robust fasteners designed for strong connections in timber and suitable masonry fixings when used with the correct wall plugs.
Unlike conventional chipboard screws, DIN 571 coach screws feature a hexagonal head that can be tightened with a spanner or socket. Their coarse wood thread provides a secure grip in suitable timber, while the unthreaded shank section on many sizes helps accommodate timber components and metal fittings.
At Intergard, you can choose between galvanized DIN 571 wood screws and stainless steel DIN 571 wood screws, depending on your application and corrosion-resistance requirements.
Our range includes 6mm, 8mm and 10mm diameters in various lengths, making these screws suitable for a wide range of professional construction, timber fixing and DIY projects.
All listed prices are per 100 screws.
What Are DIN 571 Wood Screws?
A DIN 571 wood screw is a heavy-duty fastener with an external hexagon head, pointed tip and coarse thread designed for wood. The traditional DIN 571 designation specifies the screw's dimensional design.
These fasteners are commonly referred to as coach screws in British English. They are also sometimes called lag screws or lag bolts, particularly in American English.
Coach screws are installed directly into suitably prepared timber or into an appropriate wall plug. Unlike conventional machine bolts, they do not normally require a matching nut.
Key Features of DIN 571 Coach Screws
- Hexagonal head for installation with a spanner or socket.
- Coarse wood thread for secure engagement in suitable timber.
- Pointed end designed to enter a prepared timber fixing hole.
- Robust design for a wide range of timber connections.
- Suitable for fixing certain metal brackets and fittings to timber.
- Can be used with compatible wall plugs in suitable masonry.
- Available in galvanized steel and stainless steel.
- Various diameters and lengths for different applications.
- Suitable for construction, joinery, fencing and professional DIY.
Why Choose DIN 571 Hex Head Wood Screws?
Strong Timber Connections
DIN 571 coach screws are designed for applications where a substantial threaded wood fastener is required. Their coarse thread engages with the timber and helps create a secure mechanical connection.
They are often used for fixing timber beams, posts, brackets and other wooden components.
The actual load capacity depends on the screw material, diameter, embedment depth, timber species, grain direction and connection design. For structural applications, suitable engineering verification is essential.
Hexagon Head for Controlled Tightening
The external hexagon head allows the screw to be installed using a suitable spanner, socket or socket attachment.
This provides a practical method of applying installation torque, particularly when working with larger screws or dense timber.
Suitable for Timber and Compatible Wall Plugs
Coach screws are primarily designed for wood connections, but they can also be used with appropriately selected wall plugs in suitable masonry substrates.
When fixing to brick or concrete, the strength of the connection depends on the complete fixing system, including the wall plug, screw dimensions, substrate and installation method.
Browse our wall plugs for compatible fixing options.
Choice of Corrosion-Resistant Finishes
Intergard offers galvanized and stainless steel versions of DIN 571 wood screws, allowing you to select a suitable material for the intended environment.
Galvanized steel provides corrosion protection through a zinc coating, while stainless steel offers corrosion resistance through the properties of the alloy itself.
Galvanized or Stainless Steel DIN 571 Wood Screws?
Choosing between galvanized and stainless steel coach screws depends on the installation environment, mechanical requirements and desired service life.
| Feature | Galvanized Steel | Stainless Steel |
|---|---|---|
| Corrosion protection | Protective zinc coating | Stainless steel alloy |
| Dry indoor applications | Suitable | Suitable |
| Outdoor applications | Depends on zinc coating specification | Depends on stainless steel grade |
| Typical price level | Generally lower | Generally higher |
| Selection criteria | Coating, strength and exposure | Alloy grade, strength and exposure |
Galvanized DIN 571 Coach Screws
Galvanized coach screws are made from steel with a protective zinc coating.
Depending on the product, this may be an electroplated or hot-dip galvanized finish. These coatings have different characteristics and should not be treated as interchangeable.
Galvanized screws can be a cost-effective choice for many timber connections when the coating provides adequate protection for the intended environment.
Stainless Steel DIN 571 Coach Screws
Stainless steel coach screws are suitable for many applications where increased corrosion resistance is required.
Intergard's product information identifies an A2 stainless steel version. A2 stainless steel offers good general corrosion resistance and is suitable for many ordinary outdoor environments.
For coastal, chloride-rich or particularly aggressive conditions, the suitability of the stainless steel grade should be assessed separately.
DIN 571 Wood Screw Sizes – 6mm, 8mm and 10mm
DIN 571 coach screws are specified by their nominal diameter and length.
For example, a DIN 571 8 x 100mm coach screw has a nominal screw diameter of 8mm and a length of 100mm, measured from beneath the hexagonal head to the tip.
The following diameters are represented in the supplied Intergard product range.
DIN 571 Wood Screws 6mm
6mm coach screws are suitable for appropriately designed timber and bracket connections where a relatively smaller diameter is required.
Examples in the supplied range include 6 x 30mm, 6 x 40mm, 6 x 60mm, 6 x 80mm and 6 x 100mm.
DIN 571 Wood Screws 8mm
8mm coach screws are commonly selected for timber fixing applications requiring a larger screw diameter.
Examples in the supplied range include 8 x 40mm, 8 x 60mm, 8 x 80mm, 8 x 100mm, 8 x 120mm and 8 x 150mm.
DIN 571 Wood Screws 10mm
10mm coach screws are suitable for appropriately designed connections involving larger timber sections and substantial metal fittings.
Examples in the supplied range include 10 x 60mm, 10 x 80mm, 10 x 100mm, 10 x 120mm and 10 x 150mm.
Important: Screw diameter alone does not determine the permitted load. Always assess the timber, connection geometry and fastener specification.
Where Are DIN 571 Coach Screws Used?
Timber Beams and Wooden Framework
DIN 571 coach screws are frequently used to secure suitable timber components and metal fittings to wooden beams or posts.
For load-bearing timber construction, the connection must be designed using appropriate fastener performance data and structural requirements.
Fence Posts and Garden Fencing
Coach screws can be used for suitable connections involving wooden fence posts, rails and metal brackets.
They are particularly useful where a hexagon head and a relatively large screw diameter are desirable.
Explore our fence post supports and fence fixing brackets for related timber installation products.
Post Supports and Metal Brackets
DIN 571 screws can be used with suitable metal brackets, timber connectors and post supports where the manufacturer's fixing specification permits them.
For timber posts, explore our H-post supports and U-post supports.
Fixing Heavy Objects to Suitable Walls
Coach screws may be used with appropriate wall plugs or anchors to secure brackets and other fittings to suitable masonry.
For example, radiator brackets or other substantial wall-mounted fixtures may require an appropriately rated fixing system.
The wall material, fixing spacing, load direction and anchor specification must all be considered. Coach screws should never be assumed suitable for heavy wall-mounted loads without checking the complete fixing arrangement.
General Construction and Maintenance
Hex head wood screws are also useful for repairs, refurbishment and general timber assembly where a removable mechanical fixing is required.
DIN 571 Coach Screws vs Ordinary Chipboard Screws
Although both products are designed for timber, they have different characteristics and typical applications.
| Feature | DIN 571 Coach Screws | Chipboard Screws |
|---|---|---|
| Head design | External hexagon head | Usually recessed drive |
| Thread | Coarse wood thread, commonly with an unthreaded shank section | Wood screw thread, often with a relatively slim shank |
| Installation tool | Spanner or socket | Suitable screwdriver bit |
| Typical use | Timber connections and suitable metal brackets | Furniture, panels and general joinery |
| Pre-drilling | Generally recommended | Depends on material and screw design |
Choose DIN 571 coach screws where their hexagon head, dimensions and wood thread suit the connection. Choose conventional chipboard screws for appropriate furniture, panel and lighter woodworking applications.
Which Washers Should Be Used with DIN 571 Wood Screws?
Washers can help distribute the clamping force under the hexagonal screw head and protect the surface of the connected material.
The correct washer depends on the screw diameter, the bracket hole size and the connection requirements.
Standard Flat Washers
Suitable flat washers DIN 125 A can be used where their dimensions and mechanical properties meet the requirements of the connection.
Large-Diameter Washers
Large-diameter washers DIN 9021 provide a greater bearing area and can be useful for suitable timber or bracket connections.
Always confirm that the washer fits the screw and is suitable for the intended loading.
How to Choose the Right DIN 571 Wood Screw
- Identify the application: Determine whether you are fixing timber to timber, metal to timber or a fitting to masonry.
- Assess the load: Consider the expected forces and whether the connection is structural or safety-critical.
- Select the screw diameter: Choose an appropriate 6mm, 8mm, 10mm or other specified size.
- Determine the screw length: Allow sufficient thread engagement in the receiving timber or compatible plug.
- Choose the material: Select galvanized or stainless steel according to the exposure conditions.
- Check the fixing accessories: Choose suitable washers, brackets or wall plugs where required.
- Determine the pilot-hole size: Follow the relevant installation guidance for the timber or fixing system.
- Verify the connection: For structural or heavily loaded applications, check the specified fastener performance and design requirements.
How to Install DIN 571 Coach Screws Correctly
- Prepare the components: Check that the timber and any metal fittings are correctly positioned and supported.
- Mark the fixing points: Allow suitable distances from timber ends and edges.
- Drill a pilot hole: Use a diameter appropriate to the screw, timber species and manufacturer's guidance.
- Position the bracket or washer: Fit the required hardware before inserting the screw.
- Insert the coach screw: Start the screw carefully and keep it aligned with the fixing hole.
- Tighten with a spanner or socket: Apply controlled torque using the correct tool size.
- Avoid overtightening: Stop before damaging the timber fibres or stripping the formed thread.
- Inspect the connection: Check the seating of the screw head, washer and bracket, and inspect the timber for splitting.
Installation tip: Pre-drilling is particularly important when using larger coach screws, dense hardwood or fixings close to timber edges. The correct pilot-hole diameter helps reduce splitting and excessive installation torque.
Common Mistakes When Installing DIN 571 Wood Screws
Using an Incorrect Pilot Hole
A pilot hole that is too small can cause excessive driving resistance or timber splitting. A hole that is too large can reduce thread engagement and holding strength.
Choosing the Wrong Screw Length
Insufficient thread engagement may weaken the connection. An excessively long screw may penetrate through the timber or interfere with other components.
Overtightening the Hexagon Head
Applying excessive torque can damage the timber or strip the thread formed by the screw. Use controlled tightening and follow any applicable installation instructions.
Using the Wrong Corrosion Protection
Standard electroplated screws may not be suitable for exposed outdoor conditions. Check whether hot-dip galvanized or stainless steel fasteners are required.
Assuming Every Coach Screw Is Structurally Rated
DIN 571 specifies a screw design, but it does not by itself establish a load rating for every timber connection. Structural applications require appropriate design and verified fastener performance.
Frequently Asked Questions About DIN 571 Wood Screws
What are DIN 571 wood screws?
DIN 571 wood screws are hexagon head screws with a coarse wood thread. In the UK, they are commonly known as coach screws and are used for suitable timber connections and fixing metal fittings to wood.
Are DIN 571 wood screws the same as coach screws?
Yes. DIN 571 hexagon head wood screws are commonly referred to as coach screws in British English. The term lag screw is also used in American English.
Can DIN 571 coach screws be used in concrete or brick?
They can be used with compatible wall plugs or fixing systems in suitable masonry. The screw must be matched to the plug, substrate and expected load.
Do DIN 571 coach screws need pilot holes?
Pre-drilling is generally recommended, particularly for larger diameters, hardwood and timber connections close to edges. The pilot-hole diameter must suit the screw and material.
What is the difference between galvanized and stainless steel coach screws?
Galvanized coach screws are steel screws protected by a zinc coating. Stainless steel coach screws rely on the corrosion resistance of the stainless steel alloy. The best choice depends on exposure conditions and mechanical requirements.
Which DIN 571 wood screw sizes are available?
The supplied Intergard range includes 6mm, 8mm and 10mm diameters in various lengths, including selected screws up to 150mm long. Check the product listings for the available combinations.
Can DIN 571 coach screws be used for fence posts?
Yes, coach screws can be used for suitable fence post and bracket connections. Select the correct dimensions, corrosion protection and fixing arrangement for the intended application.
Are DIN 571 wood screw prices per 100 pieces?
Yes. All listed prices for Intergard DIN 571 wood screws are per 100 screws.
Buy DIN 571 Wood Screws and Coach Screws at Intergard
Looking to buy DIN 571 wood screws online? Intergard supplies quality hexagon head coach screws for timber fixing, construction, fencing, joinery and professional DIY projects.
Choose from galvanized wood screws DIN 571 and stainless steel wood screws DIN 571 to find the right fastener for your application.
Complete your installation with suitable washers, wall plugs and post supports.
All listed prices are per 100 screws.
Wholesale DIN 571 Wood Screws for Trade Customers
Intergard has been an importer and wholesaler of garden products, hardware and fastening materials since 1997, supplying DIY retailers, garden centres, hardware merchants and professional resellers throughout Europe.
Are you a distributor, building materials supplier, hardware retailer or professional buyer looking to purchase DIN 571 coach screws in bulk, by the pallet or by the truckload?
Send us your enquiry with the required diameters, lengths, material or coating specifications, quantities and delivery address. We will be pleased to prepare a competitive wholesale quotation tailored to your requirements.
Email: info@intergard.nl
Telephone: +31 546 579030
Order DIN 571 wood screws from Intergard or request your wholesale quotation today.