Hexagonal nut standard! Standard sharing

Hexagonal nuts are used in conjunction with bolts and screws to connect and fasten machine parts. Type I hexagonal nuts are the most widely used, C nuts for the surface is relatively rough, the precision requirements of the machine, equipment or structure; A and B nuts for the surface is more polished, the precision requirements of the machine, equipment or structure of the higher type II hexagonal nut thickness m thicker, more often used for often need to assemble and disassemble the occasions. Hexagonal thin nut thickness m is thinner, mostly used for the surface space of the connected machine parts is limited occasions.

Hexagonal nuts according to the nominal thickness is divided into I type, II type and thin type three kinds. 8 level above the nut is divided into I type and II type two types.

Type I hexagonal nuts are the most widely used, type 1 nuts are divided into A, B, C three levels, of which A and B level nuts are suitable for the surface roughness of small, high precision requirements of machines, equipment and structures, while C nuts are used for the surface is relatively rough, the precision requirements of the machine, equipment or structure is not high; type II hexagonal nuts are thicker, more often in the need to install and remove the occasions. type I nuts refer to Nut nominal height m ≥ 0.8D of the ordinary hexagonal nut, the type size should be consistent with the provisions of GB/T6170; and II-type nuts than the height of 1-type nuts to be higher, the type size should be consistent with the GB/T6175. Increase the II-type nuts have two purposes: one is to increase the height of the nut to get a kind of heat treatment is not required, relatively inexpensive nuts. Because D ≤ M16 8 level I-type nuts do not need heat treatment, so in the 8-level nuts, only D> M16 ~ 39 specifications with 2-type nuts, obviously do not need heat treatment I-type nuts can not reach the mechanical properties of the 9-level nut requirements. Another purpose of the provisions of the type II nut to obtain better toughness of 12 grade nuts. As the height of the nut increases, in the lower quenching and tempering hardness can be achieved to ensure that the stress indicators, so increase the toughness of the nut. Classification by pitch: standard teeth, regular teeth, fine teeth, very fine teeth and reverse teeth. Classification by material: stainless steel hexagonal nuts and carbon steel hexagonal nuts, copper hexagonal nuts, iron hexagonal nuts. Classification by thickness: hexagon thick nuts and hexagon thin nuts. Classification according to the use of methods: hot melt copper nuts, hot pressing copper nuts, embedded copper nuts and ultrasonic copper nuts

Specifications: Square nuts C grade GB 39-88- Hexagonal nuts C grade GB /T41-2000- Hexagonal thick nuts GB 56-88- Butterfly nuts GB 62-88- Ring nuts GB 63-88- Combined cap nuts GB 802-88- Spherical hexagonal nuts GB 804-88- Button nuts GB 805-88 Knurled high nuts GB 806-88- Knurled thin nuts GB 807-88- Embedded copper nuts and ultrasonic copper nuts. Thin nuts GB 807-88 hexagonal nuts hexagonal nuts (20) - small hexagonal special flat fine tooth nuts GB 808-88- Inserted round nuts GB 809-88- small round nuts GB 810-88- round nuts GB 812-88 end face with holes round nuts GB 815-88- side with holes round nuts GB 816-88- with slots round nuts GB 817-88- Type 1 Non-metallic inserts hexagonal lock nuts GB /T 889.1-2000- Type 1 non-metallic inserts hexagonal lock nuts fine teeth GB /T 889.2-2000- Cap nuts GB 923-88- Type 1 hexagonal nuts GB /T 6170-2000- Type 1 hexagonal nuts fine teeth GB /T 6171-2000- Hexagonal thin nuts GB /T 6172.1-2000- Non-metallic inserts hexagonal lock nuts GB /T 812-88 2000- Hexagon thin nuts with non-metallic inserts GB /T 6072.2-2000- Hexagon thin nuts with fine teeth GB /T 6173-2000- Hexagon thin nuts without chamfer GB /T 6174-2000- Hexagonal nuts GB /T 6175-2000- Hexagonal nuts GB /T 6175-2000- Hexagonal nuts GB /T 6176-2000- Hexagonal flange nuts GB /T 6177.1-2000- Hexagonal flange nuts with fine teeth GB /T 6177.2-2000- Hexagonal slotted nuts type 1-Grade A and B GB 6178-86- Hexagonal slotted nuts type 1-Grade C GB 6179-86- Hexagonal slotted nuts type 2-Grade A and B GB 6180-86- Hexagonal slotted nuts with thin thread-Grade A and B GB 6181-86- Hexagonal locking nuts type 2-Grade A and B GB 6181-86- Non-metallic inserts Non-metallic insert hexagonal locknuts GB /T 6182-2000- Non-metallic insert hexagonal flange face locknuts GB /T 6183.1-2000- Non-metallic insert hexagonal flange face locknuts with fine teeth GB /T 6183.2-2000- All-metal type 1 hexagonal locknuts GB /T 6184-2000- All-metal type 2 hexagonal locknuts GB /T 6185.1-2000- Type 2 all-metal hexagon locknuts fine thread GB /T 6185.2-2000- Type 2 all-metal hexagon locknuts Grade 9 GB /T 6186-2000- All-metal hexagon flange face locknuts GB /T 6187.1-2000- All-metal hexagon flange face locknuts fine thread GB /T 6187.2-2000- Type 1 hexagon Hexagon slotted nuts fine tooth A and B GB 9457-88- 2 hexagon slotted nuts fine tooth A and B GB 9458-88- Hexagon slotted nuts fine tooth A and B GB 9459-88- Welded square nuts GB /T 13680-92- Welded hexagonal nuts GB /T 13681-92- Flat head riveting nuts GB /T 17880.1-1999- Countersunk riveting nuts GB /T 17880.1-1999- Countersunk riveting nuts GB /T 17880.1-2000- All-metal flange-face locking nuts fine tooth GB /T 6187.2-2000- All-metal flange-face locking nuts fine thread GB /T 17880.2-1999- Small countersunk head rivet nut GB /T 17880.3-1999- 120 ° small countersunk head rivet nut GB /T 17880.4-1999- Flat-head hexagonal rivet nut GB /T 17880.5-1999- Hexagonal nut GB /T 18195-2000- for precision machinery.

The standard of hexagonal nuts will be shared with you first, and new versions are welcome to add to the standard.

Hexagonal nut standard standard GB/T41-2000 this standard is equivalent to the international standard ISO 4034:1999 ((hexagonal nut product grade c level).

This standard is a part of the national standard “hexagonal wrenching fasteners” product series standards.

The series includes: a)

Hexagon head bolts:GB/T 27,G B/T 28,G B/T 29.1 ,G B/T 29.2,G B/T 31.1,G B/T 31.2,GB/T 31.3,GB/T 32.1,GB/T 32.2,GB/T 32.3,GB/T 5780,GB/T 5781,GB/T 5782,GB/T 5783,GB /T 5784,GB/T 5785 and GB/T 5786;b)

Hexagon nuts:GB/T 41,G B/T 56,G B/T 802,G B/T 804,G B/T 805,G B/T 808,G B/T 889.1,GB/T 889.2, GB/T 923, GB/T 6170, GB/T 6171, GB/T 6172.1, GB/T 6172.2, GB/T 6173,GB/T 6174,GB/T 6174,GB/T 6174,GB/T 6174,GB/T 6174,GB/T 6174,GB/T 6174,GB/T 6174,GB/T 6174,GB/T 6174,GB/T 5785 and GB/T 5786;b GB/T 6174, GB/T 6175, GB/T 6176, GB/T 6178, GB/T 6179, GB/T 6180, GB/T 6181, GB/T 6182, GB/T 6184, GB/T 6185.1, GB/T 6185.2, GB/T 6186, GB/T 9457, GB/T 9458, GB/T 9459 and GB/T 9458. /T 9459 and GB/T 18195;c)

Flange face nuts: GB/T 6177.1, GB/T 6177.2, GB/T 6183.1, GB/T 6183.2, GB/T 6187.1 and GB/T 6187.2.

1.Scope of this standard specifies the thread specifications for M5 ~ M64, performance level 4 and 5, product grade C hexagonal dawning mother such as the need for other technical requirements, should be selected from the current standards (such as GB/T196, GB/T3098.2 and GB/T3103.1)

2. Citation standards the following standards contain provisions, by reference in this standard and constitute the provisions of this standard, this standard is published, the version shown are valid, where the standard will be revised to receive inspection, marking and packaging (eqv ISO3269:1984) GB/T196-1981 common thread Basic, the use of this standard should be explored by all parties to use the following standards of the latest edition Possibility GB/T90-1985 fastener inspection size (diameter 1 ~ 600mm) GB/T197-1981 common thread Tolerance and fit (diameter 1 ~ 355mm) GB/T1237-2000 fastener marking method (eqv8991:1986) GB/T3098.2-2000 mechanical properties of fasteners Nut Coarse thread (eqv) ISO898-2:1992)GB/T3103.1-1982 Tolerance of fasteners bolts, screws and nuts (eqv ISO4759-1:1978)GB/T5267-1985 Threaded fasteners plating GB/T5276-1985 Fasteners bolts, screws, studs and nuts Dimension designation and labeling (eqv ISO225. 1983)GB/T16938-1997Fasteners bolts, screws, studs and nuts General technical conditions (idt ISO8992:1986)ISO1068

3:2000 Fasteners Non-electrical dissatisfaction with zinc powder coating 3.Size and specification table (as shown) Preferred thread specifications Non-preferred thread specifications

4. Technical conditions and reference standards (as shown)

5.Marking 5.1 Marking method according to GB/T1237 5.2 Marking example Thread specification d = M12, performance level 5, without surface treatment, product grade C hexagonal nut marking nuts GB/T41 M12 nuts Related standards: square nuts C GB 39-88 hexagonal nuts C GB /T41-2000 Hexagonal thick nuts GB 56-88 butterfly nuts GB 62-88 Ring nuts GB 63-88 Combined cap nuts GB 802-88 Spherical hexagonal nuts GB 804-88 Fastening nuts GB 805-88 Knurled high nuts GB 806-88 Knurled thin nuts GB 807-88 Small hexagonal extra-flat, fine-threaded nuts GB 808-88 Inserted circular nuts GB 809-88 Small circular nuts GB 810-88 Round nuts GB 812-88 Round nuts with holes on the end GB 815-88 Round nuts with holes on the side GB 816-88 Round nuts with slots GB 817-88 Hexagonal locknuts with non-metallic inserts of type 1 GB /T 889.1-2000 Hexagonal locknuts with non-metallic inserts of type 1 Fine threads GB /T 889.2-2000 Cap nuts GB 923-88 Hexagonal nuts of type 1 GB /T 6170-2000 Hexagon nuts of type 1 GB /T 6170-2000 Type 1 hexagon nuts fine thread GB /T 6171-2000 Hexagonal thin nuts GB /T 6172.1-2000 Hexagonal locking thin nuts with non-metallic inserts GB /T 6072.2-2000 Hexagonal thin nuts fine thread GB /T 6173-2000 Hexagonal thin nuts with no chamfer GB /T 6174-2000 Type 2 hexagonal nuts GB /T 6175-2000 Type 2 hexagonal nuts fine thread GB /T 6176-2000 Hexagonal flange nuts GB /T 6177.1-2000 Hexagonal flange nuts fine thread GB /T 6177.2-2000 Hexagonal slotted nuts type 1-Grade A and B GB 6178-86 Hexagonal slotted nuts type 1-Grade C GB 6179-86 Hexagonal slotted nuts type 2-Grade A and B GB 6180-86 Hexagonal slotted thin nuts-Grade A and B GB 6181-86 Hexagonal nuts specification weight table.