What are standard parts and fasteners?
What are standard parts?
Standard parts: refers to the structure, size, drawing, marking and other aspects have been completely Standardized, and by the professional factory to produce the commonly used parts (parts), such as threaded parts, Keys, pins, rolling bearings and so on.
What are fasteners?
Fasteners: two or more parts (or components) for the two or more parts of the fastening connection to become a whole when used in a class of mechanical parts of an overall term, is to play a role in fastening and connecting the standard parts.
Fasteners are characterized by a wide variety of specifications, performance and use of different, and standardization, serialization, generalization degree is very high, so some people have national standards of a class of fasteners known as standard fasteners, or referred to as standard parts. And some others are called non-standard parts. But their important role is the same.