Qingdao Hao Rui Steel Products Co.

　　Standard refers to the various aspects of the structure, size, painting, marking, etc. have been fully standardized, commonly used by professional plant of zero (the Department) parts, such as threaded member, keys, pins, bearing and so on. Generalized includes standardized fasteners, connecting parts, transmission parts, seals, hydraulic components, pneumatic components, bearings, springs and other mechanical parts. Narrow including only standardized fasteners. Commonly known as the domestic standard is standard fasteners for short, it is a narrow concept, but can not exclude the presence of broad concepts. In addition there are industry standard parts, such as automobile standard parts, mold standard parts, also under the broad standard.

　　Narrow standard that is standardized fasteners, is actually a link member (connector), but because of the wide range of application types, so the actual use of a single operator for a class, and even referred to as the standard.

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