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Common defects in fastener raw materials directly affect their machinability and reliability in use; these can be broadly categorised into two main types: surface defects and internal defects. The following is a detailed classification and description based on information from various sources:
Fasteners are a type of mechanical component used for securing connections and are extremely widely used. They are employed across a broad range of industries, including energy, electronics, electrical appliances, machinery, chemicals, metallurgy, moulds, hydraulics and many others.
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