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What are ISO 7090 A2 Stainless Steel HV 200 Flat Washers?
ISO 7090 washers are metric flat washers with a chamfered outer edge, designed to distribute clamping force over a larger bearing surface beneath a bolt head or nut. These washers are manufactured to the HV 200 hardness class, making them a durable choice for demanding metric fastening applications.
What is the difference between ISO 7089 and ISO 7090 Washers?
The primary difference is the outer edge design. ISO 7089 has a plain outer edge, while ISO 7090 has a chamfered outer edge on one side. Both standards are available in stainless steel with a 200 HV hardness classification. ISO 7090 is selected when the chamfered edge profile is preferred or required by the application.
What does HV 200 mean for ISO 7090 Washers?
HV 200 refers to the washer's Vickers hardness class, indicating a minimum hardness of 200 HV. This higher hardness provides increased resistance to indentation and deformation when the washer is compressed beneath a fastener. The 200 HV specification is particularly valuable in assemblies using higher-strength fasteners or higher clamping loads, where a softer stainless washer could deform more easily.
What material are ISO 7090 A2 Stainless Steel HV 200 Washers made from?
These washers are manufactured from A2 stainless steel and meet the 200 HV hardness class. A2 stainless provides excellent general corrosion resistance against moisture, humidity, and oxidation, while the hardened construction provides increased resistance to deformation.
Where are ISO 7090 A2 Stainless Steel HV 200 Washers commonly used?
ISO 7090 A2 stainless HV 200 washers are commonly used in machinery, automotive equipment, automation, electrical equipment, appliances, manufacturing equipment, instrumentation, outdoor equipment, and general mechanical assemblies. They are particularly useful where a hard, corrosion-resistant stainless steel washer with a chamfered outer edge is required.
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