The DIN966 cross recessed semi-countersunk head machine screws under GB820 are a common fastener characterized by a semi-countersunk head design, i.e., the head is partially countersunk into the surface of the part to be fastened, but not completely, thus providing a solution that is both aesthetically pleasing and provides good fastening force. This type of screw is typically used in applications where a semi-hidden screw head is required.

Stainless Steel (304/316): Offers superior corrosion resistance and is suitable for moist or corrosive environments. The 316 grade has additional molybdenum, providing even better corrosion resistance, especially in marine applications.

Carbon Steel: Provides good strength and is the most common material for bolts. It may require additional surface treatments like galvanizing for increased corrosion resistance.

Alloy Steel: Offers enhanced strength and durability. It is often used in high-stress applications where high tensile strength is required.

Advantage:

Furniture Manufacturing: Used in the assembly of furniture to join components to provide a solid and neat looking connection. Electronic Equipment: Used in the fixing of housings or components of electronic equipment to maintain the neat appearance of the equipment. Mechanical assembly: In mechanical equipment, for use in the fixing of components requiring semi-countersunk head screws.

Scope of Application

Aesthetics: The semi-countersunk head design allows the head of the screw to be partially hidden under the surface of the part being fastened, providing a more aesthetically pleasing connection. Tightening force: Semi-countersunk head screws provide better tightening force than flat head screws. Universality: Compliance with GB820 standard ensures compatibility with other standard parts.