The GB70.3 standard deals with Hexagonal countersunk head machine screws (Hexagonal countersunk head machine screws), which are fasteners with hexagonal drive slots and countersunk heads. These Din10642 screws are characterized by a hexagonal head with a countersunk head at the top, which can be embedded in the surface of the material to be secured, providing a flat or slightly below surface installation.
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:
Hexagonal Drive: The hexagonal drive allows for precise tightening and loosening using a hex key or Allen wrench, ensuring a secure fit.
Large Flat Head: The large flat head design enables the screw to sit flush with the surface, providing a neat and clean appearance.
High Strength: Typically made from high-strength steels, these screws can withstand significant loads and are suitable for heavy-duty applications.
Precision Threading: The threads are precisely cut to ensure a tight fit and prevent loosening over time.
Scope of Application
Electronic Devices: Used in the assembly of electronic devices where a flush mount is required for aesthetic or space-saving reasons.
Mechanical Equipment: Employed in machinery where a low-profile fastening solution is needed, such as in the construction of compact mechanisms or fixtures.
Automotive Industry: Can be used in automotive applications where space is at a premium and a flush finish is desired.
Aerospace and Medical Equipment: Utilized in industries where weight and space are critical, and a reliable connection is necessary.
