DIN 7349

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Quality:

200-250 HV, 300-400 HV

Coating:

HOT DIP GALV., ZINC PLATED, DACROMET, GEOMET, BLACK

Threads:

METRIC

Scope: DIN 7349 applies to flat washers with a hole diameter (nominal size) ranging from 1.6 mm to 64 mm.
Material: The standard covers flat washers made of steel or stainless steel (A2 or A4 grades). These materials are commonly used due to their strength, corrosion resistance, and durability.
Dimensions: DIN 7349 defines the dimensions of flat washers, including the outer diameter (OD), inner diameter (ID), and thickness. The standard provides specific size ranges based on the nominal size of the washer.
Technical requirements: The standard specifies various technical requirements such as hardness, surface finish, and tolerances for flat washers. These requirements ensure that the washers meet certain quality standards and perform their intended function effectively.
Usage: Flat washers, as defined by DIN 7349, are used in various applications to distribute the load or provide a bearing surface under the head of a bolt, nut, or screw. They help prevent damage to the fastener or the connected material and can improve the stability and performance of the joint.