How are hex nuts classified?What is the material of the hex nut?


Posted November 14, 2020 by yongding

There are generally two types, one is iron, that is, carbon steel. One is stainless steel, and of course there are copper and aluminum nuts, but these are less used. Copper is still useful, and aluminum nuts are rarely used.
 
 Hexagon nuts are used in conjunction with screws, bolts, and screws to connect and tighten parts. Among them, type 1 six-purpose nuts are the most widely used. Grade C nuts are used for machines, equipment or structures with rough surfaces and low precision requirements; Grade A and B nuts are used for smoother surfaces and higher precision requirements. On the machine, equipment or structure. The thickness M of the type 2 hexagon nut is thicker, and it is mostly used in occasions that often require assembly and disassembly. The thickness M of the hexagonal thin nut is relatively thin, and it is mostly used where the surface space of the connected parts is restricted.
  Hexagon nuts are divided into three types: type I, type II and thin type according to their nominal thickness. Nuts above grade 8 are divided into two types: Type 1 and Type II. Type I hex nuts are the most widely used. Type 1 nuts are divided into three levels: A, B, and C. Among them, A and B nuts are suitable for machines, equipment and structures with small surface roughness and high precision requirements. Grade C nuts are used for machines, equipment or structures with rough surfaces and low precision requirements; Type 2 hexagon nuts have a thicker thickness, and are often used in occasions that often require assembly and disassembly.
  Type 1 nuts refer to ordinary hexagon nuts with a nominal nut height of m≥0.8D, and their type and size should meet the requirements of GB/T6170; while the height of type 2 nuts is higher than that of type 1, and their type dimensions should conform to GB/ T6175. There are two purposes for adding type 2 nuts: one is to obtain a relatively inexpensive nut that does not require heat treatment by increasing the height of the nut. Because D≤M16 type 8 type 1 nuts do not need heat treatment, among the type 8 nuts, only the specifications of D>M16~39 can use type 2 nuts. Obviously, type 1 nuts that do not require heat treatment cannot reach the level of 9 nuts. Mechanical performance requirements. Another purpose of specifying type 2 nuts is to obtain a more tough grade 12 nut. As the height of the nut increases, the guaranteed stress index can be achieved at a lower quenching and tempering hardness, so the toughness of the nut is increased. Classified by tooth distance: standard teeth, regular teeth, fine teeth, very fine teeth and reverse teeth. Classified by material: stainless steel hexagon nuts and carbon steel hexagon nuts, copper hexagon nuts, iron hexagon nuts. Classified by thickness: hexagonal thick nuts and hexagonal thin nuts. According to the method of use: hot-melt copper nuts, hot-pressed copper nuts, embedded copper nuts and ultrasonic copper nuts.
  There are generally two types, one is iron, that is, carbon steel. One is stainless steel, and of course there are copper and aluminum nuts, but these are less used. Copper is still useful, and aluminum nuts are rarely used.
  There are two grades of hex nuts, one is 4.8, ordinary nuts, and the other is 8 nuts. For more industry knowledge about nuts, please read the nut specification table and the national standard specification table of the nut industry. These nut specification sheets and industry standard knowledge. Let us have a deeper understanding of nuts.
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Issued By zzz
Country China
Categories Automotive
Last Updated November 14, 2020