DIN 7981 Self-Tapping Screw with Round Head and Sharp Point, Form C

DIN 7981 covers a self-tapping screw with a sharp point and round head. It is intended for installation into soft metals, such as aluminium and its alloys, and can also be used for driving into plywood, fiberboard, and other wood-based materials.

This type of fastener does not require pre-drilling a hole or cutting a thread: thanks to its sharp point, it screws in on its own using a hand tool or power screwdriver. This speeds up installation.

Materials and application features

This type of fastener is made from carbon steel grades; to resist corrosion, the metal is given a galvanic zinc coating. Fasteners intended for use in aggressive environments are made from stainless steel grades A2 and A4. These materials have high mechanical strength, which allows the screws to be used even for fastening sheet metal.

Technical characteristics:

• The most common thread diameter variants: ST2.2, ST2.9, ST3.5, ST3.9, ST4.2, ST4.8, ST5.5, ST6.3.
• Height of the cylindrical head – from 1.8 to 4.5 mm.
• Recess type – cross recess, suitable for driving with a screwdriver or power screwdriver with a matching bit.

This type of fastener is used in industry, construction, and other sectors. Self-tapping screws are used for fastening sheet materials to frame profiles, for exterior and interior finishing of buildings. The fasteners can be used when installing siding, profiled sheeting, and metal roof tiles.

Terms of purchase from FLOK

FLOK holds official dealer status for major fastener manufacturers in Russia and abroad. Supplies are made without markups or intermediaries. Both small and large wholesale purchases are available, as well as ongoing supply for enterprises. Consultants help with selecting products and their equivalents.