DIN 7991 Hex Countersunk Machine Screws are flat head screws with a hexagonal head design for applications where the screw head needs to be countersunk or flush with the surface. They are commonly used in the assembly of furniture, mechanical structures, electronic equipment, and other applications where a concealed screw head is required. These screws feature a hexagonal hole in the head that can be tightened with a hexagonal spanner.
Material: including carbon steel, alloy steel, stainless steel (such as 304, 316, 316L, etc.) and other materials, the specific selection depends on the working environment and application requirements.
Grade: The product grade is divided into A grade and B grade, as well as different mechanical properties grade (such as 4.8 grade, 8.8 grade,10.9grade,12.9grade, A2-70, etc.), these grades reflect the tensile strength, yield strength and other mechanical properties of the bolt. Different grades are suitable for different load bearing requirements and working environments.
1. Aesthetics: The countersunk head design allows the screw head to be flush with the surface of the material being secured, providing a more aesthetically pleasing appearance.
2. High strength: DIN7991 screws are usually made of high strength materials, such as stainless steel 304/316, carbon steel and alloy steel, which can provide strong clamping force and durability.
3. Corrosion resistance: Especially stainless steel screws perform well in wet or chemical environments and are not easy to rust.
4. Good torque transmission: the hexagonal design provides better torque transmission efficiency, reducing the risk of slipping and damage during installation.
Scope of
application
1. Furniture manufacturing: In furniture assembly, DIN7991 screws can provide a solid connection while maintaining a neat appearance.
2. machinery and equipment assembly: in the assembly of machinery and equipment, these screws can provide strong clamping force and vibration resistance.
3. electronic equipment: in electronic equipment, they can be used to secure circuit boards and other internal components.
4. automotive industry: in automotive manufacturing, these screws are used to connect various metal parts such as body panels and internal structures.
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.
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.
