Machine element

SIAM FASTENER

Self-drill screws are tools used to securely fasten to steel or wooden frames without the need for pre-drilling. They are typically used for attaching roofing sheets, wall panels, plywood, and lightweight wallboards in construction or general industrial work. The screw's tip resembles a sharp drill bit, allowing it to be used with electric drills and screwdrivers. These screws are made from steel or stainless steel with excellent rust-resistant coatings, providing strength, durability, and resistance to bending. Available in various types such as drill point, slotted cut point, hexagonal drill point, and wing drill point, each type has its own shape and fastening characteristics. Choosing the right size and length ensures proper fastening for the specific material being used.

Types of Self-Drill Screws

1.) Button Head or Wafer Head Self-Drill Screw
These screws have a wide, flat head that provides strong clamping pressure, making them ideal for fastening materials to steel frames. The sharp threaded drill point allows for quick installation with a screwdriver or electric drill without needing a pre-drilled hole. They are perfect for sign installations, DIY projects, door and window hinges, steel frames, wood battens, and hard surface materials.

2.) Wing Tip Self-Drill Screw
These screws have small wings near the tip, which widen the upper hole of the material as they drill through. When the screw is tightened fully, the tapered head sinks into the steel below, allowing for a flush finish. Wing tip screws are ideal for attaching wood panels to steel frames without pre-drilling, such as Shera wood, plywood, and gypsum boards.

3.) Hex Head Self-Drill Screw with Rubber Seal
The hexagonal head is coated for rust resistance and includes a rubber seal underneath, which is non-conductive, UV-resistant, and prevents water leaks while smoothing the sharp edges of the screw hole. It is easy to install using an electric drill with a hex socket, without pre-drilling. These screws are commonly used for securing metal roofing to steel battens, wall panels, louvers, and various cover panels.

4.) Tapered Head Self-Drill Screw
These screws feature a flat head with a (+) slot, allowing for use with a screwdriver or electric drill to fasten wood panels to steel up to 3.2 mm thick without pre-drilling. The sharp, strong, and rust-resistant drill point enables quick penetration and secure fastening with minimal pressure. They are suitable for versatile applications like fastening steel frames, wood panels, and fiber cement boards.

5.) Gypsum Board Self-Drill Anchor
This accessory is designed for use with self-tapping screws or nails and features a small, sharp threaded tip that can penetrate surfaces and fasten securely. Installation is simple: use a screwdriver to insert the anchor through the gypsum board, then tighten with a screw or nail. It is suitable for general ceiling installations like gypsum board or plywood.