A bolt is a product in the form of a metal steel rod with external metric or inch threads on one side and on the opposite side - a hex head for a wrench or a hex socket head. A bolt makes a threaded connection through a nut or a threaded hole in any product being connected.
The bolt according to GOST 7798-70 is made of carbon, stainless (A2 and A4) steels, as well as brass, copper, etc.
Bolt strength class 5.8; 8.8; 10.9 and less used strength classes 12.9; 4.8; 3.6. When galvanizing bolts, shiny or matte zinc, cadmium, nickel, chrome and bluing (anodizing) are used.
The bolts offered by VIK-METIZ are widely used in the mechanical engineering industry, construction, light and heavy industry, and other industries related to production, together with nuts and washers of the same size. At the same time, bolts in accordance with GOST 7798-70 can be used for installation work in structures and equipment together with driven anchors and anchor sleeves.

Symbol of a bolt according to GOST 7798-70 version 1 with thread diameter 8 mm, hex head size "turnkey" - 13 mm and length 35 mm, coarse pitch, thread tolerance range 6g, strength class 5.8, uncoated:

Bolt M8-6g*35.58(S13) GOST 7798-70

Version 2 thread diameter 20 mm, turnkey hex head size - 30 mm and length 100 mm, fine pitch -1.5 mm, thread tolerance range 6g, strength class 8.8, steel grade 40X, coated 01 - zinc and coating thickness 6 µm:

Bolt 2M20*1.5-6g*100.88.40Х.016GOST 7798-70

Hex Bolts are produced at the AVALDA plant of accuracy class B according to GOST 7798-70 and GOST 7805-70 with popular sizes M6, M8, M10, M12, M14, M16, M18, M20, M24, M30, M36, M42 price below the market price due to our own raw materials: circles and wire. Bolts are used for fastening various structures and products made of different materials: wood, plastic, metal, plywood, concrete; from chairs to bridge assembly and aerospace.

Thread - according to GOST 24705. Thread run-out and undercut - according to GOST 27148. Bolt ends - according to GOST 12414.

Thread tolerance range: 6g

Strength class:

• 4.8, 5.8 made of steel 10, 20;
• 8.8, 10.9 made of steel 35, 20G2R, 30G1R

Types of coatings:

Galvanic coating up to 20 microns;
- thermal diffusion galvanizing, coating thickness up to 30 microns;
- black oxide film with additional oiling;
- without coating with oiling.

Package:

In wooden boxes of 50 kg. Boxes are stacked on pallets. Or polypropylene bags when ordered individually and according to drawings!

To buy hex bolts, you need to place your order correctly:

Bolt M14-6g 30.58 (S21) GOST 7798-70 is deciphered as follows: bolt version 1 with thread diameter = 14 mm, with turnkey size = 21 mm, length = 30 mm, with a large thread pitch with a tolerance range of 6g, class strength 5.8, uncoated

How do GOST 7798-70 bolts differ from GOST 7805-70 bolts?

The difference between the bolts lies in the diameter of the circumscribed circle, the bolt GOST 7805-70 is 0.2 mm larger than GOST 7798-70, as well as in the sizes produced

Hex Bolt Specifications and Design

Weight of 1000 pieces of bolts GOST 7798-70 and GOST 7805-70, kg.

Buy hex bolts at a wholesale price at the AVALDA metallurgical plant by phone or order via e-mail, Online - order. Delivery to the site. Manufacturing according to customer drawings and requirements within 10 working days. Certificate. Quality passport.

INTERSTATE STANDARD

Date of introduction 01/01/72

1. This standard applies to hex head bolts of accuracy class B with a thread diameter from 6 to 48 mm.

(Changed edition, Amendment No. 4).

2. The design and dimensions of the bolts must correspond to those indicated in the drawing and in the table. 12.

(Changed edition, Amendment No. 2 - 6).

(Changed edition, Amendment No. 5).

3b. 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.

3c. Permissible defects in the surface of bolts and control methods are in accordance with GOST 1759.2.

3a - 3c. (Introduced additionally, Amendment No. 4).

4.(Deleted, Amendment No. 4).

5. The head design options are determined by the manufacturer.

5a. It is allowed to produce bolts with the diameter of the smooth part of the rod d 1, approximately equal to the average thread diameter.

(Introduced additionally, Amendment No. 3).

5 B. To apply markings, it is allowed to manufacture bolts of versions 1 and 2 with a hole on the end surface of the head with dimensions that do not reduce the strength of the head, while the depth of the hole should be no more than 0.4 k.

(Introduced additionally, Amendment No. 5).

6. Technical requirements - according to GOST 1759.0.

7. (Deleted, Amendment No. 2).

8. The weight of the bolts is indicated in Appendix 1.

Table 1

Notes:

1. Bolt sizes enclosed in brackets are not recommended.

2. It is allowed to manufacture bolts with the dimensions specified in Appendix 2.

table 2

Notes:

1. Bolts with length dimensions enclosed in brackets are not recommended.

2. Bolts for which the values b located above the broken line, it is allowed to manufacture with a thread length up to the head.

An example of a designation for a bolt of version 1 with a thread diameter d= 12 mm, turnkey size S= 18 mm long l= 60 mm, coarse thread pitch with tolerance range 6g, strength class 5.8, uncoated:

The same, version 2, turnkey size S= 19 mm, with a fine thread pitch with a tolerance range of 6g, strength class 10.9, made of steel grade 40X, with coating 01 6 microns thick:

ANNEX 1
Information

Weight of steel bolts (version 1) with coarse thread pitch

(Changed edition, Amendment No. 5)

APPENDIX 2
Information

Additional requirements reflecting the needs of the national economy

Dimensions in mm

APPLICATION 2. (Introduced additionally, Change No. 5; amended edition, Rev. No. 6).

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the USSR Ministry of Ferrous Metallurgy

2. APPROVED AND ENTERED INTO EFFECT by Resolution of the Committee of Standards, Measures and Measuring Instruments under the Council of Ministers of the USSR dated 04.03.70 No. 270

3. The standard fully complies with ST SEV 4728-84

5. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS

6. The validity period was lifted according to Protocol No. 5-94 of the Interstate Council for Standardization, Metrology and Certification (IUS 11-12-94)

7. EDITION (February 2010) with Amendments No. 2, 3, 4, 5, 6, approved in February 1974, March 1981, March 1985, March 1989, July 1995 (IUS 3-74, 6-81, 6-85, 6-89, 9-95)

Bolts GOST 7798 70 refer to the standard type of fastener, which consists of two parts: a cylindrical rod with threaded threads and a head. These hex head hardware are sometimes called machine screws. The difference is that a bolt is a functional hardware only if there is a nut that is screwed onto a threaded GOST 7798 70 fastener rod.

The design with a head adapted for a hex key is considered one of the most common. Thus, high technological compatibility of the tools with hardware products is ensured.

The products are used in the mechanical engineering industry. In construction, bolts are used to fasten metal structures and attachments, which can be mounted using GOST 7798 70 fasteners. Hardware is characterized by mechanical strength. This is facilitated by the carbon and alloy steels used in their manufacture.

Key Features

VOLAT LLC offers to purchase bolts with large and fine thread pitches, with special properties in accordance with GOST 7798 70. If necessary, you can order hardware from us for specific operating conditions.

In production we use various types of anti-corrosion and wear-resistant steels, as well as alloys of non-ferrous metals. The length of the fastener is no more than 300 mm, the diameter of the threaded thread is 6-48 mm. The customer chooses independently:

• type of coating;
• accuracy class;
• tolerance field.

Hex head bolts can be galvanized or galvanized; we also produce uncoated black hardware in accordance with GOST 7798 70. Production according to individual customer drawings is possible.

Steel grades: 10kp, 20kp, 10, 20, 35, 20G2R, 40Х, 30ХР.

Accuracy class: B.

Thread tolerance: 6g.

Strength class: 4.8; 5.8; 8.8; 10.9.

Analogues of GOST: GOST 7805-70, GOST 15589-70.

Hex head bolts are a split type of connection. All of them are produced according to certain standards, depending on the purpose for which they are intended. This is the reason for the huge variety of different bolt samples.

Among the most popular, especially in mechanical engineering, is a bolt with a hexagonal head GOST 7798 70. Bolts with increased accuracy class A are used when the holes at the joints are only 0.25-0.3 mm larger than the diameter of the bolt, which is practically eliminates deformation of the fastening joint under increased load. The hex bolt GOST 7798-70 has a normal accuracy class - B. It is almost identical to bolts 7805-70, with the difference that it can be used for holes at the joints that are 1-1.5 mm larger than the diameter of the bolt. This type of bolt has a zinc coating, like most of its analogues. This means that such a bolt is practically not exposed to the external environment and is resistant to corrosion. This allows these bolts to be used for a long time, regardless of low or high ambient temperatures.

Bolt parameters		Nominal thread diameter d
Thread pitch, P
		-
Key size, S
Diameter, d 1
Head height, k
Diameter of circumscribed circle e, not less
hw, no less
We recommend reading Selection and development of technological schemes for the development of pits using single-bucket excavators (design of an excavator face) Technical characteristics and design of hex head bolts GOST 7798 what din Installation welds GOST 14771 76 Eco style in the interior - main rules and details Living room interior in eco styles Glass tables to order Glass table tops Production of glass tables Related Posts Electric motors 2023-09-13 00:10:28 Dining glass tables for individual projects Make a glass table to order A desk is an important attribute of any office or home. Today there are many materials for production, and in combination with... Electric motors 2023-09-12 00:13:33 Manufacturing and installation of artificial stone countertops Beautiful appearance, environmental friendliness, excellent sound-absorbing and heat-insulating characteristics, as well as resistance to...