It covers the dimensions, material properties, and mechanical requirements for hexagon head bolts in metric sizes from M3 up to M64.
The standard includes normal bolts as well as fine pitch and extra fine pitch thread versions.
DIN 1624 bolts are typically made from carbon steel, alloy steel, stainless steel, or other corrosion-resistant materials.
The standard defines the bolt head size, thread length, and other critical dimensions to ensure compatibility and interchangeability.
It also specifies mechanical strength requirements such as proof strength, tensile strength, and hardness for the different bolt grades.
DIN 1624 is widely used across German and European industry for fastening applications in machinery, vehicles, construction, and other sectors.
The standard is harmonized with international fastener standards like ISO 4017 to facilitate global trade and usage.