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Washer 10 65g 05 decoding. Grover washers (spring washers)

Washer 10 65g 05 decoding. Grover washers (spring washers)

16.09.2021

Description of the offer and product characteristics

GOST 6402-70 applies to spring washers for bolts, screws and studs with thread diameters from 2 to 48 mm.

Spring washers must be made of four types:

H - normal with a square cross section;
T - heavy with a square cross section;
OT - especially heavy with a square cross-section;
L - lungs with a rectangular cross section.

The design and main dimensions of the washers must correspond to those indicated in fig. 1 and in the table.

Washer types

k, (for washers of type L and N), no more

Light washers (L)

Normal washers (N)

Heavy washers (T)

Extra heavy washers (OT)

Prev off

Notes:

1. Increase in size is allowed s within 10% of the nominal size.

2. Washers with dimensions in parentheses may be used until 01.01.85 and the letter "y" must be indicated in their designation.

Spring Washer Symbols version 1 for a bolt, screw, stud with a diameter of 8 mm:

normal steel grade 3X13 without coating:

Washer 8 3X13 GOST 6402-70

light steel grade 65G with a chromated cadmium coating 9 microns thick:

Washer 8L 65G 029 GOST 6402-70

the same, version 2, with dimensions in parentheses:

Washer 2U 8L 65G 029 GOST 6402-70

The mass of steel washers and the calculated elastic force of 65G steel are indicated in the appendix.

Steel spring washers must have a hardness of 41.5-49.5 HRC e (HRC40-48), bronze at least 90 HRB. An increase in hardness up to 51.5 HRC e (HRC 50) is allowed for washers made of steel 70.

The surface of the washers should be free of scale, burrs, cracks and corrosion. Traces of inseparable scale are not a rejection sign.

In the plane of the cut, defects are allowed that do not affect the performance of the washers and do not take its dimensions beyond the maximum deviations.

The ends of the washers must have a flat cut; metal chipping, not dimensioning T from the maximum deviations, is not a rejection sign.

The edge formed by the shear plane and the washer bearing surface must be sharp.

Washer trapezoidal section within height s is not a defect.

The largest dimension of the height is taken as the actual thickness. s.

Washers should be made uncoated or coated. Types of coatings, their symbols and thicknesses - according to the normative and technical documentation. It is allowed to use other types of coating - in accordance with GOST 9.306-85.

APPLICATION
Reference

MASS OF STEEL WASHERS GOST 6402-70 AND THEIR SPRING PROPERTIES

Theoretical weight 1000 pcs. steel washers, kg				Design elastic force of washers made of steel 65G, N
Washer types				Washer types
Lungs (L)	Normal (N)	Heavy (T)	Extremely severe (OT)	Lungs (L)	Normal (N)	Heavy (T)	Extremely severe (OT)

Notes:

1. To determine the mass of bronze washers, the mass indicated in the table should be multiplied by a factor of 1.08.

2. In parentheses are the mass and elastic force of washers made with sections corresponding to table. 1.

Spring washer GOST 6402-70- the hardware configuration is an open ring with distortion - a single coil of the spring, while the gap is opposite to the direction of tightening the nut. It is used in detachable threaded connections together with bolts, screws, nuts, studs.

The spring washer (another name is "grover") is in demand mostly in the engineering industry, automotive, construction, industry - everywhere in joints experiencing strong dynamic loads. Often used for household purposes.

Various grades of steel are used for production - carbon steel, stainless steel, for example, 65G, 70, 30X13 (spring steel).

Bronze and other non-ferrous metal alloys are used less often.
Coating with zinc or cadmium improves the performance of the hardware. For non-aggressive media it is permissible to use uncoated.
The basic requirement for these hardware is that the hardness indicator must be from 40 HRC and above, bronze products - at least 90 HRB.

WASHER GROVER - principle of operation, production options

Grover's washer is an unacceptable, according to GOST 27017, name of a spring single-turn washer GOST 6402-70, but has long taken its place. English engineer William Grover invented a new type of fastener in the wake of the explosive growth of various inventions of the 19th century. The stresses and vibrations that were incredible for mechanics at the time resulted in a problem that was later called "fatigue failure." Connections secured with conventional threaded fasteners were loosened.
Grover's invention withstands shock loads while acting as a stopper. The principle of operation lies in the action of an elementary law of physics - during a forward stroke (screwing), the movement of a threaded fastener is unimpeded, during an opposite stroke (unscrewing), the sharp edge "abuts", stopping the movement due to friction.
This hardware is chosen with a diameter slightly larger than the diameter of a bolt or screw. The grover is located between the nut and the fastening surface or flat washer, or under the head of a bolt or screw. Thus, threaded connections become durable and safe for a long time.
The 6402-70 standard defines four types:
Н - normal - square cross-section;
T - heavy - also with a square section;
OT - especially heavy - with a square cross section;
L - lungs - for this type, the cross-section is a rectangle.

We read the designation:
Washer 2 12L 65G 016 GOST 6402-70
The formula indicates version 2 (version 1 is not indicated in any way),
12 - for a bolt, screw or stud of the specified diameter,
L - light, steel 65G,
galvanized (01), coating thickness 6 microns.

Production of grover washers GOST 6402-70 in our company it is certified according to the requirements of ISO 9001 - the quality of all types of manufactured hardware is guaranteed. We standardly check all the parameters of each batch: appearance, dimensions, hardness, viscosity, spring properties, coating quality. The price of washers GOST 6402-70 is determined by the material used, the type of coating and the volume of the order.

Grover washers or grover washers, in contrast to flat and other various washers, are made not from a metal sheet or circle, but from a special spring wire. In order for the wire to have the properties of a spring, it must be made of specialty steel such as 65G or 3X13. Locking washers are specially designed to prevent self-loosening of the nut, i.e. lock washers are a kind of lock washers. Due to the fact that the spring washers are made from spring wire, they got their second name - spring washers. In the figure below, you can see how spring washers (spring washers) look schematically:

Locking washers (spring washers):

As can be seen from the schematic image above, the spring washers are a cut circular ring with ends located in different planes. Spring washers have a springy structure, and during installation they tightly fix the nut, pressing it against the thread and preventing this nut from loosening. Grover washers are manufactured in accordance with GOST 6402-70 and can be manufactured in 2 different versions. In the figure below, you can see how each of these versions looks schematically:

As can be seen from the schematic image above, spring washers of design 1 differ from spring washers of design 2 in that the cut ends of the washers of the second design are slightly bent. Foreign analogue of GOST 6402-70 - DIN 127. Diameter of spring washers according to GOST 6402-70 (washers according to DIN 127) varies from 2 mm to 48 mm.

Below is an example of the conventional designation of grover washers in accordance with GOST 6402-70:

Spring washer version 1 for a bolt, screw, stud with a diameter of 8 mm, normal, from steel grade 65G uncoated:

Washer 8 65G GOST 6402-70

Also, in addition to versions, grooving washers can be made in four versions:

Light washers
Grover washers normal
Heavy washers
Extra heavy spring washers

Depending on the version in which the washers are made, they can have different thicknesses, as well as weight. Grover washers in accordance with GOST 6402-70 (grover washers in accordance with DIN 127) can be made with a galvanized coating. Galvanized Grover washers are less susceptible to corrosion and stay in good condition longer. Galvanizing can be of various thicknesses, but our company supplies galvanized washers with galvanized thickness in two versions - 6 microns and 9 microns. Galvanized spring washers are slightly more expensive than black spring washers, but they can be used in more severe conditions, therefore galvanized spring washers are widely used among consumers who use washers in a humid environment or an environment not protected from the influence of weather conditions.

Below is an example of the conventional designation of galvanized grover washers in accordance with GOST 6402-70:

Grover washer, galvanized, version 1, for fasteners with a diameter of 16mm, made of steel grade 65G:

Washer 16.65G.019 GOST 6402-70

Those. from an example of a conventional designation, it is clear that zinc plating is indicated by a combination of numbers - 01, plus its thickness. In the table below you can see the mass of all spring washers in accordance with GOST 6402-70:

Nominal thread diameter of a bolt, screw, stud	Theoretical weight 1000 pcs. steel washers, kg
	Washer types
	Lungs (L)	Normal (N)	Heavy (T)	Extremely severe (OT)
2	0,030	0,017	0,025	-
2,5	0,042	0,030	0,056
3	0,061	0,064	0,105
3,5	0,094	0,117	-
4	0,129	0,189	0,273
5	0,191	0,315	0,432
6	0,378	0,487	0,827
7	0,749	0,936	-
8	0,827	1,034	1,678
10	1,608	2,010	2,984	4,212
12	3,462	3,450	4,816	6,488
14	5,487	5,355	7,316	9,509
16	7,507	8,022	10,56	13,34
18	10,23	11,40	14,62	18,06
20	14,33	15,75	19,70	23,89
22	19,25	20,92	25,66	36,14
24	24,16	27,12	38,55	51,93
27	33,14	41,76	56,67	73,71
30	46,14	60,87	79,80	101,1
33	65,07	49,52	-	-
36	69,51	91,03	115,9	173,9
39	73,9	86,37	-	-
42	113,9	129,7	195,2
45	120,1	123,5	-
48	126,3	215,2	-

If you need other characteristics of spring washers made according to GOST 6402-70 (spring washers according to DIN 127), then you can see them by downloading GOST 6402-70 from our website.

Using the above table on our website, you can always accurately calculate the cost of transportation costs. it indicates the weight of all existing grooving washers in accordance with GOST 6402-70.

Our company can supply spring washers made of steel grade 65G (steel spring washers, galvanized spring washers). In addition to Russian regulations, our company supplies spring washers made according to foreign DIN and ISO standards.

All grover washers and galvanized grover washers supplied by our company are issued with quality certificates.

If you still have questions related to the washers, you can ask them to the managers of our company by e-mail

SPRING WASHERS

TECHNICAL CONDITIONS

GOST 6402-70

(ST SEV 2665-80)

Moscow

STATE STANDARD OF THE UNION OF SSR

By the decree of the Committee of Standards, Measures and Measuring Instruments under the Council of Ministers of the USSR No. 532 dated April 17, 1970, the date of introduction is set

Retrieved 1982

from 01.01.72

This standard applies to spring washers for bolts, screws and studs with thread diameters from 2 to 48 mm.

The standard is fully consistent with ST SEV 2665-80.

1. DESIGN AND DIMENSIONS

1.1. Spring washers must be of four types:

H - normal with a square cross section;

T - heavy with a square cross section;

OT - especially heavy with a square cross-section;

L - lungs with a rectangular cross section.

1.2. The design and main dimensions of the washers must correspond to those indicated in fig. and in.

3.4-3.8.(Modified edition, Amendment No. 3).

3.9. Each batch of washers must be accompanied by a quality document of the established form indicating:

the name or trademark of the manufacturer,

washers symbol,

test results,

batch net, kg.

(Introduced additionally, Amendment No. 3).

4. PACKAGING AND LABELING

4.1. Temporary corrosion protection, packing of spring washers and container marking - in accordance with GOST 18160-72.

(Modified edition, Amendment No. 3).

APPLICATION
Reference

WEIGHT OF STEEL WASHERS AND THEIR SPRING PROPERTIES

Nominal thread diameter of a bolt, screw, stud

Theoretical weight 1000 pcs. steel washers, kg

Design elastic force of washers made of steel 65G, N

Washer types

Lungs (L)

Normal (N)

Heavy (T)

Extremely severe (OT)

Lungs (L)

Normal (N)

Heavy (T)

Extremely severe (OT)

0,030

0,017

0,025

26,5

0,042

0,030

0,056

14,7

16,7

57,8

0,084

(0,061)

0,064

0,105

35,3

(8,8)

38,2

0,094

0,117

21,6

71,5

0,129

(0,190)

0,129

(0,189)

0,273

14,7

(50,0)

52,9

(136)

0,191

(0,318)

0,228

(0,315)

0,432

28,4

(67,6)

71,5

(158)

0,378

(0,560)

0,376

(0,487)

0,827

36,3

(81,3)

88,2

(184)

0,749

0,936

92,1

0,827

(1,046)

1,034

1,678

71,5

(69,6)

/ washer GOST 6402-70 spring, washer grover

Spring washer GOST 6402-70 or grover washer is a split circular washer, the ends of which are located in different planes, which serves to prevent self-loosening of fasteners by means of its elastic deformation under load. It is made of 65G spring steel with subsequent heat treatment.

An increase in the contact area of the bolted connection of parts, as well as a decrease in pressure on the surface, is achieved using the grover washers of the required diameter.

Spring washers are used in mechanical engineering and instrumentation as locking elements of the connection.

The grover washer must be uncoated or coated. Types of coatings, their symbols and thicknesses - according to the normative and technical documentation.

By installing a grover washer, the stability of the mechanical connection is achieved.

Washer size range: M6, M8, M10, M12, M16, M20, M24, M27, M30, M36, M42, M48, M52.

Spring washer (grover washer GOST 6402) is of four types:

H - normal with a square cross section;
T - heavy with a square cross section;
OT - especially heavy with a square cross-section;
L - light with a rectangular cross-section.

At the request of the consumer, the grover washer are coated by chemical galvanizing or thermal diffusion.

Washer GOST 6402-70 spring (grover)

Nominal thread diameter of a bolt, screw, stud	d	Washer types
		Lungs (L)		Normal (N)	Heavy (T)	Extremely severe (OT)
		b	s	b = s	b = s	b = s
2	2,1	0,8	0,5	0,5	0,6
2,5	2,6	0,8	0,6	0,6	0,8
3,0	3,1	1,0	0,8	0,8	1,0
3,5	3,6	1,0	0,8	1,0	1,0
4,0	4,1	1,2	0,8	1,0	1,4
5,0	5,1	1,2	1,0	1,2	1,6
6,0	6,1	1,6	1,2	1,4	2,0
8,0	8,2	2,0	1,6	2,0	2,5
10,0	10,2	2,5	2,0	2,5	3,0	3,5
12,0	12,2	3,5	2,5	3,0	3,5	4,0
14,0	14,2	4,0	3,0	3,2	4,0	4,5
16,0	16,3	4,5	3,2	3,5	4,5	5,0
18,0	18,3	5,0	3,5	4,0	5,0	5,5
20,0	20,5	5,5	4,0	4,5	5,5	6,0
22,0	22,5	6,0	4,5	5,0	6,0	7,0
24,0	24,5	6,5	4,8	5,5	7,0	8,0
27,0	27,5	7,0	5,5	6,0	8,0	9,0
30,0	30,5	8,0	6,0	6,5	9,0	10,0

Examples of symbols:

Grover washer GOST 6402, version 1 for a bolt, screw, stud with a diameter of 8 mm normal from steel grade 3X13 without coating:

Washer 8 3X13 GOST 6402-70

Light grover washer with a diameter of 10 mm made of 65G steel with a chromated cadmium coating 9 microns thick:

Washer 10L 65G 029 GOST 6402-70

Light spring washer, version 2, diameter 16 mm with dimensions in brackets:

Washer 16L 65G 029 GOST 6402-70

Normal spring washer, version 2, 20 mm in diameter with dimensions in brackets:

Washer 20 65G 029 GOST 6402-70

TECHNICAL REQUIREMENTS.

Spring washers should be made of wire in accordance with GOST 11850-72 or other normative and technical documentation from steel grades 65G, 70 and 3X13. It is allowed to manufacture spring washers from bronze of the BrKMts3-1 brand in accordance with GOST 18175-78 or other non-ferrous alloys.

The mass of steel washers and the calculated elastic force of 65G steel are indicated in the appendix.

Steel spring washers must have a hardness of 41.5-49.5, bronze at least 90> HRB. An increase in hardness up to 51.5 HRC 50) is allowed for washers made of steel 70. The edge formed by the shear plane and the washer bearing surface must be sharp.

The surface of the washers should be free of scale, burrs, cracks and corrosion. Traces of inseparable scale are not a rejection sign.

In the plane of the cut, defects are allowed that do not affect the performance of the washers and do not take its dimensions beyond the maximum deviations.

The ends of the washers must have a flat cut; metal chipping, not dimensioning T from the maximum deviations, is not a rejection sign.

Washer trapezoidal section within height s is not a defect. The largest dimension of the height is taken as the actual thickness. s

Cathodic reduction metal coated washers must be dehydrated.

The height of the spread of the ends of the washers h 1 and h 2 after three times compressing them to a flat state and holding in this state for 24 hours, there should be at least 1.65 of the actual thickness of the washer. Washers must not break or crack when the ends are bent by 45 °.

RULES OF ACCEPTANCE AND CONTROL METHODS.

Acceptance rules - in accordance with GOST 17769-83 for products of rough accuracy (accuracy class C).

Quality control of coatings is carried out according to a one-stage plan at a control level of 5-2 and an acceptance level of defectiveness of 4% in accordance with GOST 18242-72.

Washers are selected from each batch submitted for delivery to check: appearance, dimensions, hardness, viscosity, spring properties, coating quality.

The appearance of the washers is checked by inspection with the naked eye or using a magnifying glass of 2.5-3x magnification.

The dimensions of the washers are checked with a universal measuring tool or calibers certified in conjunction with measurement techniques in the manner prescribed by GOST 8.010-90.

Determination of hardness - according to GOST 9013-59. The distance from the center of the print to the edge of the washer should be half the size v... The hardness of washers with nominal diameters from 2 to 5 mm is not controlled. For washers with v< 6 мм допускаются заниженные на 10 % значения твердости.

For the toughness test, one end of the washer is clamped in a vice, the other end is bent with an adjustable wrench or a lever with a slot in the direction of increasing dimensions h 1 and h2 (damn1,2,3). During the test, the size must be maintained h between the jaws of the vise and the key, equal to 0.5 d.

Testing the spring properties of washers is carried out in the following order:

a) the washer is compressed three times to a flat state;

b) a spring washer, at least 10 pieces, separated from each other by flat washers, are put on the bolt rod of the corresponding diameter and tightened with a nut until the divorced ends of the washers are fully compressed.

The washers are kept in this state for 24 hours. Methods for checking the quality of coatings are in accordance with GOST 9.302-88.

Each batch must be accompanied by a quality document of the established form indicating: the name or trademark of the manufacturer, the symbol of the washers, test results, net batch, kg.

Various types of washers, a large assortment, high quality and affordable prices for fasteners, grower's washers are always favorable conditions for cooperation.