Countersunk Allen screw DIN 7991 M12x40-10.9

Product detailed description

The DIN 7991 M12x40-10.9 countersunk head screw is a structural element designed for applications where a flat surface of the joint is required. This type of screw is equipped with a countersunk head with an internal hexagon, which allows it to be embedded in the material so that the head does not protrude above the surface, thus achieving an aesthetic and functional design of the joint.

The screw is made of steel of strength class 10.9, which guarantees high strength and reliability of the connection. This material is suitable for applications where high resistance to mechanical stress is required. The surface of the screw is untreated, which is important to consider when using in an environment with a risk of corrosion.

The dimensions of the screw are defined as follows: the thread diameter is M12, the screw length is 40 mm, the head height is 4.6 mm and the head diameter is 24 mm. The width of the internal hexagon is 8 mm, which is compatible with common Allen keys. The head height is 7.4 mm, which ensures sufficient connection strength while maintaining the countersunk nature.

The screw is manufactured according to DIN 7991, which is equivalent to ISO 10642 and ČSN 021144. These standards define the geometric and mechanical properties of the screw, including a metric thread with a pitch of 1.75 mm and a countersunk head angle of 90°. These parameters are key to ensuring compatibility and proper function in structural applications.

This screw is ideal for use in metal and structural applications where it is necessary to achieve a strong and reliable connection with minimal visual and physical surface disturbance.