Thread-forming screws with sealing washers are specialized fasteners that provide a secure connection and a reliable seal. They are particularly suitable for applications where the ingress of moisture or dust must be prevented, such as in metal construction, facades, roofs, or photovoltaic systems. This article will tell you more about the properties, advantages, and typical applications of these practical screws.
What are thread-forming screws with a sealing washer?
Thread-forming screws, also known as self-tapping screws, are designed to cut a thread into the material as they are screwed in, without requiring pre-drilling. The integrated sealing washer consists of metal with an elastic seal, usually made of EPDM (ethylene propylene diene monomer rubber). This combination ensures not only a secure fastening but also a long-term seal against water, dust, and other environmental influences.
Properties of thread-forming screws with sealing washer
These screws offer a variety of properties that make them ideal for demanding applications:
- Self-tapping thread: Cuts a precisely fitting thread in metal or plastic and ensures a secure connection.
- Sealing washer: The elastic seal prevents moisture from penetrating and protects the connection from corrosion.
- High stability: They offer a durable connection, even in heavy constructions.
- Corrosion resistance: Materials such as stainless steel or galvanized steel make the screws weatherproof and durable.
- Easy assembly: No pre-drilling is required, which speeds up installation.
Applications of thread-forming screws with sealing washer
These screws are used in numerous industries and projects:
1. Metal construction
In metal construction, thread-forming screws with sealing washers are ideal for fastening metal plates, profiles, and other structures. The sealing washer protects against corrosion and ensures a durable connection.
2. Facade construction
In facade construction, they are frequently used to fasten cladding and coverings. The integrated seal prevents moisture penetration, thus increasing the longevity of the structure.
3. Roof structures
In roof constructions, they serve to securely fasten sheet metal, corrugated sheets, or other roofing materials. The sealing washer ensures that no moisture penetrates the interior.
4. Photovoltaic systems
In photovoltaics, these screws are a preferred choice for mounting modules and mounting systems on roofs. The seal protects the system from the elements and increases its lifespan.
5. DIY
For DIY projects, thread-forming screws with sealing washers offer a practical solution for securely and tightly fastening metal or plastic constructions.
Advantages of thread-forming screws with sealing washer
Using these screws offers numerous advantages:
- Time efficiency: The self-tapping thread eliminates the need for pre-drilling and saves time.
- Protection against corrosion: The sealing washer prevents moisture from penetrating and protects the connection from rust.
- Durability: High-quality materials ensure a long service life, even in demanding environments.
- Safety: The screws provide a stable and durable connection.
- Flexibility: They are suitable for various materials and applications.
Tips for using thread-forming screws with sealing washers
To ensure these screws perform optimally, please observe the following instructions:
- Suitable material: Choose screws that are suitable for the material to be joined (e.g., metal, plastic).
- Tools: Use a powerful cordless screwdriver or screwdriver with a suitable bit.
- Mounting surface: Ensure the surface is clean and free of contaminants to guarantee optimal sealing.
- Corrosion protection: For outdoor applications, screws made of galvanized steel or stainless steel should be used.
- Secure connection: Tighten the screws sufficiently to properly compress the sealing washer without damaging it.
Conclusion: Thread-forming screws with sealing washer for reliable connections
Thread-forming screws with sealing washers are a practical and effective solution for secure and leak-proof fastenings in a wide variety of applications. Their self-tapping properties, combined with reliable sealing, make them an indispensable component in the construction industry, photovoltaic systems, and many other sectors. With proper selection and application, these screws provide a durable and stable connection that meets the highest demands.
This existing glossary article was reviewed and approved on 14 October 2026. Time-sensitive information still refers to its original publication context unless the article states otherwise. It does not replace installation instructions or confirm compatibility with a particular roof tile model.
Machine-assisted translation. The German version remains available.
Data sheet and installation guideOriginal source