Self-tapping screw

A self-tapping wood screw is a fastener designed for joining wood and wood-based board materials. It is a metal shaft with a full cut thread and a flat head fitted with a four-lobe Pz recess. The product is designed to be driven into wood materials while protecting them from cracking. The countersunk flat head is fully recessed into the material and does not protrude above the surface.

Design of the self-tapping wood screw

The screw is fitted with a special thread, so it can be driven directly into a pre-drilled hole without first tapping an internal thread in it — this speeds up and simplifies the assembly of wooden structures. The tip has a four-sided shape, which protects the material from cracking. This type of fastener has several important features:

• Full thread with a large thread height, providing maximum-strength fixation of the fastener in the material when joining parts. The thread runs from the very tip almost all the way to the head.
• Ability to install into soft materials without pre-drilling a hole. Installation can be done using a hand tool or a power screwdriver.
• A reinforced tip for faster driving.

A wide size range is available, with the size marking stamped on the screw head. A fastener of the required length can be selected for secure fixation.

Materials used for the self-tapping wood screw

To increase corrosion resistance, the product can be supplied with the following types of coating:

• Oxide coating. The metal is covered with an oxide film, giving these screws a black color. They are suitable for use in rooms with normal humidity levels.
• White or yellow zinc coating. A thin layer of non-ferrous metal provides corrosion protection; zinc-plated fasteners can withstand prolonged contact with moisture. An additional benefit is the decorative appearance of the heads after installation.

Screws can have a standard, fine, or coarse thread pitch: a higher number of thread turns improves the reliability of fixation in wood. Such products are used for fastenings that must withstand increased loads.

Application possibilities for the fastener

Self-tapping wood screws are widely used in construction. They are used for the following purposes:

• Assembly of wooden frames, installation of rafters and other load-bearing structures. These screws provide strong, durable fixation and prevent cracking in the material.
• Assembly of frames with subsequent fastening of various wooden exterior and interior building finishes.
• Fastening of gypsum board and gypsum fiber board sheets to wooden battens.
• Fastening various materials to wood and concrete. To install the screws into hard materials, holes are pre-drilled and expansion wall plugs are inserted into them.
• Installation of various types of roofing materials, providing secure fixation to rafters.

Self-tapping wood screws are also widely used in furniture manufacturing, for assembling structures and parts made of wood and wood-based materials. Their use speeds up assembly work and eliminates the need to spend time pre-preparing holes in the material.

Order terms

FLOK supplies self-tapping wood screws wholesale in a wide range of sizes. The products are manufactured in compliance with standards, ensuring strength and long-term durability.