Hex nut, accuracy class A, GOST 5927-70.
The nut is used in mechanical engineering and construction as connection parts.
Accuracy class: A.
Thread tolerance: 6H.
Strength class: 4; 5; 6; 8; 10; 12.
Close analogues (ISO, DIN, EN ISO):
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Standard |
Name |
Note |
DIN 934 |
Hex nut |
Similar parameters to DIN 934 and GOST 5927-70. The height of the GOST 5927-70 nut is slightly lower than that of DIN 934. |
EN ISO 4032 |
Hex nut |
Similar parameters to EN ISO 4032 and GOST 5927-70. The height of the GOST 5927-70 nut is slightly lower than that of EN ISO 4032. |
EN ISO 4033 |
High-strength hex nut |
EN ISO 4033 only applies to nuts with property class 12. |
EN ISO 8673 |
Hex nut with fine thread pitch |
EN ISO 8673 only applies to fine thread pitches. |
GOST5927-70:
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Nut parameters |
Nominal thread diameter d |
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Thread pitch, P |
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maximum |
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Diameter of circumscribed circle e, not less |
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dw, no less |
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Key size, S |
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Theoretical weight 1000pcs. nuts, kg |
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All parameters in the table are indicated in mm.
On 01/01/1991, a change was made to GOST, providing for the possibility of manufacturing sizes M10, M12, M14, M22 with the following changes in parameters, while the rest remained unchanged:
If it is necessary to take these parameters into account when ordering products with the nominal size indicated in the table, please check with managers about these parameters.
Additional information about the technical characteristics of the nut can be obtained from the company’s managers.
STATE STANDARD OF THE USSR UNION
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HEX NUTS Design and dimensions Hexagon nuts, product grade A. |
GOST (ST SEV 3680-82) |
Date of introduction 01.01.72
in terms of turnkey size S = 13 mm 01.01.73
1. This standard applies to hex nuts of accuracy class A with thread diameters from 1 to 48 mm. The standard fully complies with ST SEV 3680-82. (Changed edition, Amendment No. 4). 2. The design and dimensions of the nuts must correspond to those indicated in the drawing and table. (Changed edition, Amendment No. 3, 4, 6, 7). 3. Thread - according to GOST 24705. (Changed edition, Amendment No. 2, 4, 5). 3a. Tolerances of dimensions, deviations in shape and location of surfaces and control methods not established by this standard are in accordance with GOST 1759.1. 3b. Permissible surface defects of nuts and control methods - according to GOST 1759.3. 3a, 3b. (Introduced additionally, Amendment No. 5). 4. It is allowed, by agreement between the manufacturer and the consumer, to produce nuts with a nominal thread diameter from 36 to 48 mm with a thread pitch of 2 mm. (Changed edition, Amendment No. 2, 5). 5. Technical requirements - according to GOST 1759.0. 6. (Deleted, Amendment No. 2). 7. The weight of the nuts is indicated in Appendix 1. 8. (Deleted, Amendment No. 4).
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Nominal thread diameter d |
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Thread pitch |
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Turnkey size S |
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Diameter of circumscribed circle e, not less |
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no less |
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no more |
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d w , not less |
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Height t |
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An example of a symbol for a nut with a thread diameter d = 12 mm, with a turnkey size S = 18 mm, with a large thread pitch with a tolerance range of 6H, strength class 5, without coating:
Nut M12-6N.5 (S 18) GOST 5927-70
The same, with a large thread pitch with a tolerance range of 6H, strength class 6, made of steel grade A12, without coating:
Nut М12-6Н.6.А (S 18) GOST 5927-70
The same, with a turnkey size S = 19 mm, with a fine thread pitch with a tolerance range of 6H, strength class 12, made of steel grade 40X, with a coating of 01 with a thickness of 6 microns:
Nut M12 ´ 1.25-6Н.12.40Х.016 GOST 5927-70
ANNEX 1
Information
Weight of steel nuts with coarse threads
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Nominal thread diameter d, mm |
Theoretical weight 1000 pcs. nuts, kg » |
Nominal thread diameter d, mm |
Theoretical weight 1000 pcs. nuts, kg » |
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Various types of repair and construction work these days are carried out using nuts - metal fasteners, in the center of which there is a special threaded connection. Hexagonal products have become widespread and are used everywhere.
1
The described hexagonal fasteners necessarily have a structural element that allows torque to be transmitted using wrenches of various sizes. Due to this, the nut is tightened (fixed) on the rod component of the screw pair. Such a component can be a screw, bolt, or a special threaded rod.
Hexagonal products for connecting various structures and elements are most often made of ferrous metals and steel. Much less often the material for their production is plastic. To connect components and mechanisms of various electrical units, nuts made of non-ferrous metals are also used.
Photo of hex nuts for connecting various structures
Conventional metal hexagonal products are often subjected to additional processing in order to improve their performance characteristics. The technology of metallization of nuts is often used - applying a small layer of metal with special properties to their surface. This operation guarantees an increase in the hardness, rust resistance and wear resistance of the nut. The most common types of metallization are the following product processing procedures:
- galvanizing;
- nickel plating;
- chrome plating;
- bluing.
2
Nuts with six edges in Russia and many CIS countries of all popular sizes (M6, M8) are manufactured according to State Standards 5915 and 5927, adopted in 1970. GOST 5927–70 applies to hexagonal products with a thread cross-section from 1 to 48 millimeters, which have accuracy class A. The thread pitch of such nuts according to standard 5927 varies from 0.25 to 5 mm. The thread itself is applied according to GOST 24705.
In the photo - nuts with six sides
The mass of 1000 pieces of class A products without coating (State Standard 5927) varies from 0.062 (nuts with a thread cross-section of 1 mm) to 956.2 (cross-section - 48 mm) kilograms. Finished products are checked for quality according to GOST 1759.3. The same standard describes possible surface defects on nuts. Tolerances for the location of surfaces, deviations in geometric shape and dimensions are specified in GOST 1759.1.
Photo of a class A hex nut
State standard 5915–70 applies to nuts of accuracy class B, which can have a cross-section from 1.6 to 48 mm, a mass of 1000 pieces from 0.046 to 956.2 kilograms. The thread pitch of products according to GOST 5915–70 is from 0.35 to 5 mm. Testing of nuts according to standard 5915 is carried out according to requirements similar to those that apply to products manufactured according to State Standard 5927–70.
3
It is not at all difficult to understand what diameter a particular nut has. If the fastener is marked “M8”, this means that we have a nut with a thread cross-section of 8 mm, if “M6” - with a cross-section of 6 mm. The diameter has a direct relationship with all other parameters of fasteners. They are not indicated on the nut, but it is quite easy to determine them using special tables. You can use tabular data from the already mentioned GOST 5927 and 5915.
In the photo - hex nuts with markings
Any nuts with six edges are also marked with their strength class. Maximum strength is indicated by a dot marked on the product. Other classes are marked with one or two lines (they are called risks). On nuts with a thread cross-section of less than 5 mm, a dot or marks are applied to the chamfer and described by a convex shape. But on products with a cross-section of more than 5 mm (M8, M6, and so on), these marks are applied to the side or to the supporting surface.
Photo of strength classes of hex nuts
Nuts of different diameters are used in almost all industrial applications, including construction industry, at home. Any cyclist and motorist uses hexagonal products M8 and M6. With their help, many parts and structural elements of production machines and units are attached. M6 and M8 nuts (as well as products of larger diameter) are indispensable in the construction of houses and buildings, and the arrangement of utilities. In the production of furniture, hexagonal fasteners marked “M6” and below are also actively used.
Pictured are stainless steel hex nuts
DIN 934 allows the production of hexagonal fasteners with additional coating of its surface, produced using gas-thermal, hot and chrome plating and nickel plating (galvanic), bluing technologies.
Nuts with six edges and large threads are marked according to DIN 934 according to the thread section - from M1 to M110. Such products have a height from 0.8 to 88 mm, their geometric dimensions are designed for keys from 2.5 to 155 mm.
Photo of hex nut DIN 934
Note that DIN 934 divides fasteners with coarse threads into two accuracy groups - A and B. Nuts with fine threads according to the German standard are marked from "M8x1" to "M64x4". They have a length from 6.5 to 51 mm. They work with wrenches from 13 to 95 mm. Products with fine threads according to DIN 934 contain the letters "LH" in the designation. The marking looks like this - M5 LH - M30 LH.
5
Nuts with a flange can have a thread section in the range of 5–20 mm according to GOST 50592, which is adopted in Russian Federation. Analogues of this State Standard are ISO 4161 and DIN 6923 standards. Hexagonal products with a flange are considered simpler and more reliable to use. They guarantee maximum reliability of the connection and its high strength due to the fact that the flange eliminates the possibility of spontaneous loosening of the nut.
In the photo - hex nuts with flange
Main parameters of fasteners with a flange (in millimeters):
- thread pitch – from 0.8 (M5) to 2.5 (M20);
- turnkey height (smallest) – from 1 to 3;
- radius of mating of the faces and corners of a hexagonal product – up to 0.3–1.2;
- The theoretical weight of 1000 units of fasteners is from 1.39 to 83.47 kg.
Geometric dimensions finished products with flange are checked using ring flat gauges. This verification technique makes it possible to establish compliance of all product parameters with the requirements of Gosstandart. Flange nuts must be checked for flange thickness. The purpose of such an analysis is to confirm that the thickness of the finished product is greater than or equal to the standard values at the transition of the flange to the hexagon.
Hex nut GOST 5927-70 and accuracy class “A” are quite common in many industries and production. The product is used in the installation of various components and assemblies. This nut is used in conjunction with bolts, washers and other fasteners in accordance with its parameters and dimensions.
In order for the product to maximally satisfy the conditions of its application, it is provided various options its execution. For example, for the production of GOST 5927-70 can be used different material, such as steel, stainless steel, brass and others.
Material and coating:
The coating of such a nut is selected depending on the future conditions of its operation, as well as technical requirements To her. Among the most common coatings are: thermal diffusion galvanizing, chrome plating, galvanic zinc plating and nickel plating. It is worth noting that OPM can also supply you with a fastener element made with cadmium coating. However, you should know that cadmium is dangerous to humans, and it is not recommended to interact with such hardware. One of the main advantages of such coatings is their high corrosion resistance. The hex nut GOST 5927-70 has partial analogues of other standards. By contacting our consultants, you will receive full information for their replacement. Call and order!
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| Nominal thread diameter d | (1) | (1,4) | 1,6 | 2 | 2,5 | 3 | (3,5) | 4 | 5 | 6 | 8 | 10 | 12 | (14) | 16 | (18) | 20 | (22) | 24 | (27) | 30 | 36 | 42 | 48 | ||
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| Thread pitch | large | 0,25 | 0,30 | 0,35 | 0,40 | 0,45 | 0,5 | 0,6 | 0,7 | 0,8 | 1 | 1,25 | 1,5 | 1,75 | 2 | 2,5 | 3 | 3,5 | 4 | 4,5 | 5 | |||||
| small | - | 1 | 1,25 | 1,5 | 2 | 3 | ||||||||||||||||||||
| Turnkey size S | 3,2 | 4 | 5 | 5,5 | 6 | 7 | 8 | 10 | 13 | 16 | 18 | 21 | 24 | 27 | 30 | 34 | 36 | 41 | 46 | 55 | 65 | 75 | ||||
| Diameter of circumscribed circle e, not less | 3,4 | 4,3 | 5,5 | 6 | 6,6 | 7,7 | 8,8 | 11,1 | 14,4 | 17,8 | 20,0 | 23,4 | 26,8 | 30,1 | 33,5 | 37,7 | 40,0 | 45,6 | 51,3 | 61,3 | 72,6 | 83,9 | ||||
| da | no less | 1,0 | 1,4 | 1,6 | 2,0 | 2,5 | 3 | 3,5 | 4,0 | 5,0 | 6,0 | 8,0 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | 24 | 27 | 30 | 36 | 42 | 48 | |
| no more | 1,15 | 1,61 | 1,84 | 2,30 | 2,9 | 3,45 | 4,00 | 4,60 | 5,75 | 6,75 | 8,75 | 10,8 | 13,0 | 15,1 | 17,3 | 19,4 | 21,6 | 23,8 | 25,9 | 29,2 | 32,4 | 38,9 | 45,40 | 51,80 | ||
| dw, no less | 2,90 | 3,60 | 4,50 | 5,00 | 5,40 | 6,30 | 7,20 | 9,00 | 11,7 | 14,6 | 16,6 | 19,6 | 22,5 | 25,3 | 28,2 | 31,7 | 33,6 | 38,4 | 43,1 | 51,5 | 61,0 | 70,5 | ||||
| Height t | 1,0 | 1,3 | 1,6 | 2,0 | 2,4 | 2,8 | 3,2 | 4,7 | 5,2 | 6,8 | 8,4 | 10,8 | 12,8 | 14,8 | 16,4 | 18,0 | 19,8 | 21,5 | 23,6 | 25,6 | 31,0 | 34,0 | 38,0 | |||