How do different types of screws differ?

There are numerous types of screws that differ greatly in their properties and applications. The differences mainly concern the material, shape, and thread of the screws.

Material: Screws can be made from various materials, including steel, stainless steel, brass, aluminum, or plastic. The choice of material depends on the specific requirement and intended use.

• Steel: High-strength and robust, suitable for load-bearing connections.
• Stainless steel: Rust-resistant and weatherproof, suitable for outdoor use.
• Brass: Corrosion-resistant, but not as strong as steel or stainless steel.
• Aluminum: Lightweight and rust-resistant, but less strong than steel.
• Plastic: Lightweight and corrosion-resistant, but not suitable for heavy loads.

Shape: Depending on the application, there are different screw heads such as countersunk head, pan head, or hex head.

Thread: A distinction can be made between fully threaded (continuous thread over the entire length) and partially threaded (thread only over part of the length). There are also various thread types such as metric thread, fine thread, or wood thread.