Here's the breakdown:
* Grade: This refers to the tensile strength of the fastener material (like a bolt or screw). Higher grades indicate stronger materials. For example, a Grade 2 bolt is weaker than a Grade 8 bolt.
* Hardness: This is a separate property that describes how resistant a material is to indentation or scratching. It's often measured on scales like Rockwell or Brinell.
Therefore, you can't directly determine the hardness of a Grade 2 washer based on its grade.
To determine the hardness of a Grade 2 washer, you would need:
* The specific material: Was it made of steel, stainless steel, or another material?
* The material's heat treatment: The hardness of a material can be altered by heat treatment processes.
It's important to note that washers are often made from softer materials than the bolts or screws they are paired with. This is because they are designed to deform slightly under load, providing a better clamping force.
If you need to find the hardness of a specific Grade 2 washer, it's best to consult the manufacturer's specifications or a materials handbook.