Nut is a fastener with internal thread, which is used with bolt. It is a mechanical part with internal thread, which is used with bolt to transmit movement or power.
Nut is a nut, which is a part screwed together with bolts or screws for fastening. This is the original that all production and manufacturing machines must use. There are many kinds of nuts, including GB nuts, GB nuts, American nuts and Japanese nuts. Nuts are divided into carbon steel, high-strength nuts, stainless steel and plastic steel according to different materials. According to product attributes, according to different national standards, it is divided into ordinary, non-standard, (old) national standard nuts and new national standard nuts. Threads of different sizes are of different specifications. General national and German standards are represented by M (for example, M8, M 16), and American and British systems are represented by fractional or # (for example, 8#, 10#,14, 3/8) fasteners. Nuts are parts that closely connect mechanical equipment. For example, the nut of M4-0.7 can only be equipped with the screw of M4-0.7 (in the nut, M4 means that the inner diameter of the nut is about 4mm, and 0.7 means that the spacing between two threads is 0.7 mm); So are American products. For example, the nut of 1/4-20 can only be matched with the screw of 1/4-20 (1/4 means that the inner diameter of the nut is about 0.25 inch, and 20 means that there are 20 teeth per inch).
Classification hexagon nuts are divided into three types according to their nominal thickness: I type, II type and thin type. Nuts above grade 8 are divided into 1 type and type II.
Type I hexagon nuts are widely used. 1 nuts are divided into three grades: A, B and C. Among them, Grade A and B nuts are suitable for machines, equipment or structures with small surface roughness and high precision requirements, while Grade C nuts are used for machines, equipment or structures with rough surface and low precision requirements. Type 2 hexagon nut is relatively thick, and is often used in situations where disassembly is needed.
1 type nut refers to an ordinary hexagonal nut with a nominal height of m≥0.8D, and its model and size shall comply with the provisions of GB/T6 170;
The height of type 2 nut is higher than that of type 1 nut, and its model and size shall conform to GB/T6 175. There are two purposes to add type 2 nut: one is to get a lower cost nut without heat treatment by increasing the height of the nut.
Because grade 8 1 nuts with D≤M 16 do not need heat treatment, type 2 nuts are only used in specifications of D >: M 16~39.
Obviously, the 1 type nut without heat treatment can not meet the mechanical performance requirements of grade 9 nut. Another purpose of specifying type 2 nuts is to obtain 12 grade nuts with better toughness. Due to the increase of nut height, the guaranteed stress index can be achieved at a lower quenched and tempered hardness, thus increasing the toughness of the nut.
According to tooth pitch: standard teeth, regular teeth, fine teeth, extremely fine teeth and reverse teeth.
According to material classification: stainless steel hexagon nuts and carbon steel hexagon nuts, copper hexagon nuts and iron hexagon nuts.
Classification by thickness: hexagon thick nuts and hexagonal thin nuts.
According to the usage method, it can be divided into hot-melt copper nuts, hot-pressed copper nuts, embedded copper nuts and ultrasonic copper nuts.
GB/T52-76 Hexagon Nut.
Hexagon thick nut (GB/T55-76)
GB/T56-76 Hexagon Extra Thick Nut
JG/T 5057.22- 1995 Type 2 Hexagon Nuts with High Strength for Construction Machinery and Equipment
JG/T 5057.2 1- 1995 high-strength hexagon nuts for construction machinery and equipment.
Hb 8240 ~ HB 8242-2002 HB 8223-2002 mj thread small hexagon nut
HB 8238-2002 MJ thread blind hole small hexagon nut
Hexagon nut GB 6 170-86 I
GB/T 6176-2000 Ⅱ Hexagon Nut Fine Tooth
GB/T 6 177-2000 flanged hexagon nut (also known as flanged hexagon nut)
GB/T 18230.7-2000 Type 2 hexagon nuts for bolt structure are hot-dip galvanized (increasing tapping size) Grade A and Grade 9.
GB/T 18230.6-2000 Hexagon Nut for Bolt Structure 1 Type Hot Galvanizing (Enlarging Tapping Size) Grade A and Grade B, Grade 5, 6 and 8.
GB/T 18230.4-2000 Hexagon Nuts for Bolt Structure 1 Class B1Class 0.
GB/T 18230.3-2000 Hexagon Nuts for Bolt Structure Grade B, Grade 8 and Grade 10
GB/T 1229-2006 high-strength hexagon nuts for steel structures
GB/T 6170-2000 New Standard for Type I Hexagon Nuts
GB/T 6171-2000Ⅰ Hexagon Nut Fine Teeth
GB/T 4 1-2000 Hexagon Nut Grade C
Hexagon nuts for precision machinery +08 195-2000
GB/T 123 1-2006 technical requirements for high-strength hexagon bolts, hexagon nuts and washers for steel structures?
Gb/t1231-1991technical specification for high-strength hexagon bolts, hexagon nuts and washers for steel structures.
Gb/t1229-1991high strength hexagon nut for steel structure.
JB/T 9163.17-1999 Dimensions of hexagon nuts with shoulders
JB/T 8004.7- 1999 Hexagon Nuts for Parts and Components of Machine Tool Fixture
JB/T 8004. 1- 1999 Hexagon Nut with Shoulder for Parts and Components of Machine Tool Fixture
JB/T 42 10.9- 1996 Type B upsetting pusher for cold upsetting hexagon nut die
JB/T 42 10.8- 1996 Die for Cold Upsetting Hexagon Nuts Upsetting Ball Push Rod Type A
JB/T 42 10.7- 1996 cold heading hexagon nut die upsetting ball die type b
JB/T 42 10.6- 1996 cold heading hexagon nut die upsetting ball die type a
JB/T 42 10.5- 1996 Cold upsetting hexagon nut die upsetting ball punch B type
JB/T 42 10.4- 1996 Cold upsetting hexagon nut die upsetting ball punch A type
JB/T 42 10.3- 1996 Plastic ejector pin for cold heading hexagon nut die
JB/T 42 10.25- 1996 Punching die D for cold heading hexagon nut
JB/T 42 10.24- 1996 Punching die C for cold heading hexagon nut
JB/T 42 10.23- 1996 Punching Die B for Cold Heading Hexagon Nut
JB/T 42 10.22- 1996 Punching Die A for Cold Heading Hexagon Nut
JB/T 42 10.2- 1996 Forming Die for Cold Heading Hexagon Nut
JB/T 4210.21-1996 Punch D for Cold Heading Hexagon Nut Die
JB/T 42 10.20- 1996 Punch C for Cold Heading Hexagon Nut Die
JB/T 4210.19-1996 Type B Punch for Cold Heading Hexagon Nut Die
JB/T 4210.18-1996 Punch A for Cold Heading Hexagon Nut Die
JB/T 4210.17-1996 Cold heading hexagon nut die upsetting hexagon die D type.
Jb/t 4210.16-1996 cold heading hexagon nut die upsetting hexagon die (six-piece composite cemented carbide) C type.
JB/T 4210.15-1996 Cold Upsetting Hexagon Nut Die Upsetting Hexagon Die (Cemented Carbide) Type B
JB/T 4210.14-1996 Cold Upsetting Hexagon Nut Die Upsetting Hexagon Die (Cemented Carbide) Type A
JB/T 4210.13-1996 Die for Cold Upsetting Hexagon Nuts Upsetting Hexagon Lower Punch Type B
JB/T 4210.12-1996 Die for Cold Upsetting Hexagon Nuts Upsetting Hexagon Lower Punch A Type
Jb/t 4210.1-1996 cold heading hexagon nut die forming punch 175KB.
JB/T 4210.11-1996B upsetting die for cold heading hexagon nut.
JB/T 4210.1KLOC-0/996 Hexagon Nut Upsetting Die
Hexagon nut type GB/T 6 175-2000 2 (higher than 1)
GB/T 6 170-2000 1 hexagon nut (basically universal)