Screw cylindrical head - hex DIN 912 M4x70-8.8

Product detailed description

The cylinder head screw with internal hexagon, also known as an Allen screw, is manufactured according to DIN 912, ISO 4762 and ČSN 021143. This screw has a metric thread with a diameter of M4 and a length of 70 mm. The thread pitch is 0.70 mm, which is standard for this type of screw. The screw is made of steel with a strength class of 8.8, which means that it has a high tensile strength and is suitable for applications where high preload is required.

The cylinder head of the screw has a diameter of 7 mm and a height of 4 mm. The internal hexagon, also known as an Allen key, allows for easy assembly and disassembly using an Allen key, which is advantageous in areas with limited access. The width B1, which is important for the correct insertion of the key, is 3 mm.

The screw is supplied without surface treatment, which means it is blackened, and is suitable for use in environments where increased corrosion resistance is not required. The thread length is 20 mm, which allows for a firm hold in the material.

This screw is ideal for fixed screw connections with high preload and is widely used in mechanical engineering, the automotive industry and other technical applications where high strength and reliability of connections are required.