DIN 7989 is a German standard for flat washers used in steel structures, specifically designed for high-strength bolts. It comprises two grades: the commonly used Grade C (DIN 7989-1) and the higher-precision Grade A (DIN 7989-2). Key features include high hardness (100 HV)—offering superior pressure resistance compared to standard washers—and a uniform thickness of 8 mm across all sizes. With an inner diameter slightly larger than the bolt and a generous outer diameter, these washers effectively distribute pressure and protect steel components.
Product Data
Specification
M10
M24
M12
M27
M16
M30
M20
M33
M22
M36
Applications
Building Insulation: Primarily used in the installation of thermal insulation systems in residential, commercial, and industrial buildings.
External Wall Insulation: Often used in External Thermal Insulation Composite Systems (ETICS) to fix insulation boards to external walls.
Roof Insulation: Suitable for securing insulation materials on roofs to enhance energy efficiency and thermal performance.
Floor Insulation: Utilized in floor insulation systems to prevent heat loss through the flooring and improve overall energy efficiency.
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