The DIN 964 standard specifies the dimensions and tolerances of semi-countersunk head machine screws, which are commonly used in applications where the head of the screw is required to be partially embedded in the surface of the part to be secured. The head of these screws is designed with a hemispherical shape to provide a smooth transition, while the slots are designed to facilitate quick installation and removal using a screwdriver.
These screws are usually made of stainless steel, carbon steel, or other metallic materials. Surface treatments may include zinc plating, nickel plating, passivation, etc. to improve corrosion and wear resistance. The chemical composition of the stainless steel material should be within the range specified in the steel group, the chemical composition of A2 and A4 stainless steel is specified in the following table .
Advantage:
Precise Adjustment: Semi-countersunk head design allows the screw head to be partially countersunk into the surface of the piece being fastened, providing precise adjustment and fastening. Aesthetics: The cross slot design provides good driving force and is easy to install and remove manually, while the semi-countersunk head design allows for a flat, more aesthetically pleasing appearance after installation. High Torque Transmission: Hex head design provides high driving torque and reduces the risk of wire slippage. Anti-loosening performance: DIN 964 screws usually use H or Z type cross recesses, which have good anti-loosening performance.
Scope of Application
Wooden furniture: in the assembly of wooden furniture, it is used to connect and fix parts, such as drawers, door panels, etc. Metal products: in the assembly of metal products, it is used to fix the parts that need half countersinking treatment. Mechanical equipment: in mechanical equipment, used to fix the parts that need half countersinking treatment, such as panels, hoods and so on. Architectural decoration: In architectural decoration, it is used for fixing interior decorative panels, ceilings, etc.
