DIN 7982 Countersunk Head Self-Tapping Screw for Thin Metal Sheets, Form C

DIN 7982 covers a self-tapping screw with a pointed end; the threaded metal shaft is fitted with a countersunk head. This type of fastener is used for installation in thin metal sheets, allowing mounting without pre-drilling a hole thanks to the sharp tip.

The countersunk head sits fully flush in the material, and for convenient driving it is fitted with a cross recess or TORX recess. The closest equivalent is manufactured to DIN 7972, but that self-tapping screw has a slot recess rather than a cross recess.

Manufacturing and application features

The screws are made of hardened steel, which has high mechanical strength. To improve corrosion resistance, the steel may be coated with zinc, or protected with a layer of nickel or chrome. Any coating type is applied by electroplating. The fastener can also be made from A2 or A4 stainless steel, which is not subject to corrosion.

Countersunk head self-tapping screws have the following technical characteristics:

• The length of the threaded metal shaft per the standard can range from 6.5 to 80 mm.
• The nominal thread diameter is from 2.2 to 8 millimeters.
• The head diameter can range from 4.3 to 16.1 mm. Thanks to the countersunk form, it does not protrude above the surface of the material.

Countersunk head self-tapping screws are used in construction, finishing work, and industry. They are suitable for use with thin-sheet materials: the sharp tip easily penetrates the metal sheet. Such products can be used to fasten sheet materials to frames, install various cladding, facade finishing, and more. Self-tapping screws are also widely used in mechanical engineering, instrument making, and other industries.

Ordering products from FLOK

FLOK supplies fastener products that meet the requirements of standards. One-off and regular supplies are available, with sales in small and large wholesale lots.