GB819 Cross recessed countersunk head screws are a common type of fastener characterized by a countersunk head design, i.e. the head is partially sunk into the surface of the part to be fastened, but not completely, thus providing a solution that is both aesthetically pleasing and offers good fastening performance. This type of screw is typically used in locations where precise adjustment and fastening is required, such as in machine assembly, automotive manufacturing, furniture manufacturing, etc.
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: The countersunk head design allows the screw head to be partially sunk into the surface of the piece being secured, providing precise adjustment and fastening. Aesthetics: The cross slot design provides good driving force for easy manual installation and removal, while the 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: GB819 screws usually use H-type or Z-type cross slot, which has good anti-loosening performance.
Scope of Application
Mechanical assembly: Used to secure components in mechanical equipment, such as bearings, gears, etc. Building structures: used in building structures to connect structural components to ensure long-term stability. Electronic equipment: used in the fixing of housings or components of electronic equipment to ensure the stability of the components. Transportation: used in the assembly of automobiles, ships and airplanes to ensure long-term fixation of components.
Quality Certification
Hebei Bentley is ISO9001:2015 certified and equipped with relevant certificates for quality assurance. Due to its specific dimensions and performance levels, it is suitable for a wide range of industrial and commercial scenarios including, but not limited to: machine building, construction work, transport, energy industry, timber frame connections.
Quality inspection
Bentley has invested a huge amount of money to builda product testing laboratory, equipped with importedhigh-end instruments:such as thread comprehensivescanners, high temperature tensile testing machines,high frequency fatigue testing machines, etc., to ensurethat all products are strictly tested before leaving thewarehouse to ensure the reliability of customers duringuse.
