DIN 931
DIN 931 is a standard from the German Institute for Standardization (DIN) for hexagon bolts with a shank and partial thread. This standard defines the dimensions, tolerances, and mechanical properties of hexagon bolts used in a wide range of mechanical and structural applications. Hexagon bolts according to DIN 931 are available in various sizes and materials to meet different requirements.
Features and Dimensions
DIN 931 hexagon bolts come in various diameters and lengths, with common thread sizes ranging from M5 to M64. These bolts have a hexagonal head that allows easy handling with wrenches and ratchet tools. They have a partial thread, which typically covers half to two-thirds of the shank length. The standardized dimensions ensure a reliable and uniform fit.
Materials and Surface Treatments
DIN 931 hexagon bolts are made from various materials to meet different demands for strength, corrosion resistance, and temperature resistance. Common materials include:
Steel (grades 8.8, 10.9, 12.9)
Stainless steel (A2, A4)
Brass
Additionally, the bolts may have various surface treatments to improve corrosion resistance. Common surface treatments include:
Zinc plating
Blackening
Nickel plating
Applications
DIN 931 hexagon bolts are used in many fields, including:
Mechanical engineering: For fastening parts and structures in machines and equipment.
Automotive industry: For securing bolted connections in vehicles.
Construction industry: For securing structural connections in buildings and bridges.
Household appliances: For fastening components in various household devices.
Assembly and Usage
When assembling DIN 931 hexagon bolts, it is important to select the correct size and suitable material to ensure optimal performance and longevity of the connection. Bolts should be tightened with a suitable wrench or ratchet to achieve the proper tension. For applications requiring high corrosion resistance, appropriately coated bolts should be used.
Conclusion
DIN 931 hexagon bolts are essential fasteners in many mechanical and structural applications. Their standardized dimensions and materials ensure a reliable and secure connection that meets the demands of diverse areas of use.