Bolts: Mechanical parts, cylindrical threaded fasteners with nuts. A class of fasteners consisting of a head and a screw (a cylinder with an external thread) in conjunction with a nut for fastening two parts with a through hole. This form of connection is called bolt connection.
Read MoreNaruts are the parts that are screwed with bolts or screws to play a tightening effect. One component that all manufacturing machinery must be used is divided into carbon steel, stainless steel, non -ferrous metals (such as copper), etc. Several types.
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