The stud is the fastener used to match the nut. Nuts are parts that tightly connect mechanical equipment. The nut is a part that connects the mechanical equipment tightly. Through the inner thread, nuts and bolts of the same specification can be connected together. For example, M4-P0.7 nuts can only be connected with M4-P0.7 series bolts ( In the nut, M4 means that the inner diameter of the nut is about 4mm, and 0.7 means that the distance between the two thread teeth is 0.7mm); the nut is the nut, which is screwed together with the bolt or screw for fastening. All production A component that must be used in manufacturing machinery can be divided into carbon steel, stainless steel, and non-ferrous metals (such as copper) according to different materials.
Bolts: mechanical parts, cylindrical threaded fasteners with nuts. A type of fastener consisting of a head and a screw (cylinder with external thread), which needs to be matched with a nut to fasten and connect two parts with through holes. This type of connection is called bolt connection. If you unscrew the nut from the bolt, you can separate the two parts, so the bolt connection is a detachable connection
Bolt: a type of fastener consisting of two parts: head and screw (the dao screw in this zhi refers only to the threaded part, and the drive screw is not a concept at all). It needs to be matched with the nut for tightening Securely connect two parts with through holes.
Screws: A type of fasteners composed of two parts, the head and the screw, can be divided into three categories according to the purpose-machine screws, set screws, special purpose screws.
In addition, their fastening tools are different. Bolts generally use wrench tools, and screws generally use screwdriver tools; the fastening methods are different. Bolts are generally used in conjunction with nuts or screwed into the processed bolt holes, except for screws. These two methods also have self-tapping screws, which are directly screwed into a soft workpiece without processing bolt holes. For example, the wood screw we call is this kind of screw; the shape is different, and the head of the bolt is generally adapted The tools, such as hexagonal bolts and hexagon socket bolts, have their heads exposed outside the workpiece. To make the surface of the workpiece flat, it must be hollowed out. The hexagon socket bolts are used. The heads of the screws are generally flush with the surface of the workpiece. Those bolts that are not self-tapping should also be machined with a bevel on the surface of the workpiece, so that the screw head is flush with the surface of the workpiece.