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THE BASIC CONTENT OF THE HEXAGONAL THREAD
A nut is a fastener that has internal threads and is used with a bolt, and has internal threads and is used in conjunction with the screw to transfer motion or power to the mechanical parts.
A nut is a nut, a part that is screwed together with a bolt or screw for fastening, and an original that must be used in all manufacturing machinery. There are many kinds of nuts. We often have the national standard, British standard, American standard and Japanese standard nut. Nuts are divided into carbon steel, high strength, stainless steel, plastic steel and other types according to different materials. According to the product standard corresponding to the country's different standard number is divided into ordinary, non-standard, (old) national standard, new national standard, the American system, British system, German standard. Different sizes, the threads are not equally divided into different specifications. General national standard, German standard is indicated by medium number (such as M8, M16), American system, English system is used with score or # indicates specification (such as 8#, 10#, 1 / 4, 3 / 8) fasteners, nuts are mechanical The parts that are closely connected to the equipment can be connected together by the inner thread and the same size nut and screw. For example, the M4-0.7 Nut can only be matched with the M4 -0.7 screw (in the nut, M4 refers to the inner diameter of the nut). Approximately 4 mm, 0.7 means the distance between the two threads is 0.7 mm); the US products are also the same, for example, the 1 / 4-20 Nuts can only be matched with the 1 / 4-20 screw (1/4 finger nut) The inner diameter is approximately 0.25 inches and 20 fingers have 20 teeth per inch).
Hexagon nut is used with bolts and screws to connect and fasten the parts. Among them, the type 1 hex nut is the most widely used, and the C-class nut is used for machines, equipment or structures with rough surface and low precision; Class A and Class B nuts are used for smooth surface and high precision.
The thickness of the 0.2-type hex nut on the machine, equipment or structure is thicker, and it is often used in applications where the hexagonal thin nut is thinner and often used for the limitation of the surface space of the connected parts.