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Type I hexagon 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 on machines, equipment or structures with rough surfaces and low precision requirements;
The thickness of the II type hexagon nut is relatively thick, and it is mostly used in occasions where assembly and disassembly are often required.
Type I nuts refer to ordinary hexagon nuts with a nominal nut height m≥0.8D, and their type and size should meet the requirements of GB/T6170;
The height of type II nut is higher than that of type 1, and its type and size should conform to GB/T6175. There are two purposes for adding type II nuts: one is to obtain a relatively inexpensive nut that does not require heat treatment by increasing the height of the nut.
Because the 8-level I-type nuts with D≤M16 do not need heat treatment, among the 8-level nuts, only the specifications of D>M16~39 can use the 2-type nuts.
Obviously, type I nuts that do not require heat treatment cannot meet the mechanical performance requirements of grade 9 nuts. Another purpose of specifying type II nuts is to obtain a grade 12 nut with better toughness. 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 inverted teeth.
Classified by material: stainless steel hexagonal nuts and carbon steel hexagonal nuts, copper hexagonal nuts, iron hexagonal 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.
The thickness of the II type hexagon nut is relatively thick, and it is mostly used in occasions where assembly and disassembly are often required.
Type I nuts refer to ordinary hexagon nuts with a nominal nut height m≥0.8D, and their type and size should meet the requirements of GB/T6170;
The height of type II nut is higher than that of type 1, and its type and size should conform to GB/T6175. There are two purposes for adding type II nuts: one is to obtain a relatively inexpensive nut that does not require heat treatment by increasing the height of the nut.
Because the 8-level I-type nuts with D≤M16 do not need heat treatment, among the 8-level nuts, only the specifications of D>M16~39 can use the 2-type nuts.
Obviously, type I nuts that do not require heat treatment cannot meet the mechanical performance requirements of grade 9 nuts. Another purpose of specifying type II nuts is to obtain a grade 12 nut with better toughness. 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 inverted teeth.
Classified by material: stainless steel hexagonal nuts and carbon steel hexagonal nuts, copper hexagonal nuts, iron hexagonal 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.