GB-T 5787 Hexagon Head Flange Bolts

Product: GB-T 5787 Hexagon Head Flange Bolts

Property Class:4.6,4.8,5.6,5.8,8.8,10.9,12.9,

A2-70, A4-70,A4-80

Finish:Zinc Plating(Yellow Zinc, Zinc Blue, Rinse Color), Black, Phosphate & Oil, Zinc Phosphate, Hot-dip Galvanized(HDG),Dacromet, Geomet

Material:Steel

Export country: USA, Japan, Australia, Europe and so on

Support customer customization


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Product Details

 GB 5787 hexagonal flange bolt is an important connector with simple structure and reliable connection. Its hexagonal head with holes and grooves can lock the bolts by mechanical methods to prevent loosening reliably. The size of flange bolts varies according to the different calibers and pressure levels of the connecting flanges. The standard specifies the dimensional requirements of flange bolts under different pressure levels, such as bolt diameter, bolt length, bolt head diameter and bolt head thickness. Surface treatment can improve the corrosion resistance and wear resistance of flange bolts and extend their service life. GB 5787 hexagonal flange bolts are widely used in many industries such as automotive engines, heavy machinery, shipbuilding heavy industry, medical equipment, food machinery, electronic communication equipment, etc.

Pictures

GB-T 5787 Hexagon Head Flange Bolts GB-T 5787 Hexagon Head Flange Bolts GB-T 5787 Hexagon Head Flange Bolts GB-T 5787 Hexagon Head Flange Bolts

Product drawing

GB-T 5787 Hexagon Head Flange Bolts

Product Specification

Size

M5

M6

M8

M10

M12

M14

M16

b

l<125

16

18

22

26

30

34

38

125<l<200

/

/

28

32

36

40

44

l>200

/

/

/

/

/

53

57

c min

1

1.1

1.2

1.5

1.8

2.1

2.4

da max

Type A

5.7

6.8

9.2

11.2

13.7

15.7

17.7

Type B

6.2

7.4

10.0

12.6

15.2

17.7

20.7

dc  max

11.4

13.6

17.0

20.8

24.7

28.6

32.8

ds

max

5.0

6.0

8.0

10.0

12.0

14.0

16.0

min

4.82

5.82

7.78

9.78

11.73

13.73

15.73

du max

5.5

6.6

9.0

11.0

13.5

15.5

17.5

dw min

9.4

11.6

14.9

18.7

22.6

26.4

30.6

e min

7.44

8.56

10.8

14.08

16.32

19.68

22.94

f max

1.4

2.0

2.0

2.0

3.0

3.0

3.0

k max

5.6

6.8

8.5

9.78

11.9

12.9

15.1

k' min

2.3

2.9

3.8

4.3

5.4

5.6

6.7

r1 min

0.2

0.25

0.4

0.4

0.6

0.6

0.6

r2 max

0.3

0.4

0.5

0.6

0.7

0.9

1.0

r3 min

0.1

0.1

0.15

0.2

0.25

0.3

0.35

r4

3.0

3.4

4.3

4.3

6.4

6.4

6.4

s

max

7.0

8.0

10.0

13.0

15.0

18.0

21.0

min

6.64

7.64

9.64

12.57

14.57

17.57

20.48

t

max

0.15

0.25

0.25

0.3

0.35

0.45

0.5

min

0.05

0.05

0.1

0.15

0.15

0.2

0.25

Support customer customization



Some introduction about our company

Application

Jinan Star Company specializes in the production of fastener products. Our bolts, nuts and other products are widely used in machinery, railways, automobiles, construction, electrical, bridges, communications, firefighting and other industries.

GB-T 5787 Hexagon Head Flange Bolts

Workshop

The workshop of Jinan Star Fastener Co., Ltd. is the core area of the company's production and manufacturing, with advanced production equipment. The reasonable layout of the workshop and the scientific production process ensure the efficient production and high-quality output of fastener products.

GB-T 5787 Hexagon Head Flange Bolts

Certification

Jinan Star Fastener Co., Ltd. has obtained the 2015 version of ISO9001 quality management system certification through the scientific management of leaders of various departments and the pursuit of high quality for bolts and other fasteners. In addition, the laboratory owned by Star Company has obtained the certification in 2017. It passed the national CNAS certification in 2018, and the company passed the European CE certification in 2018.

GB-T 5787 Hexagon Head Flange BoltsGB-T 5787 Hexagon Head Flange Bolts

Production equipment

In order to meet the needs of different customers, the company has introduced a series of advanced production equipment, such as multi-station cold heading machines, thread rolling equipment, heat treatment equipment, shot blasting machines, sandblasting machines, electroplating lines and other surface treatment equipment, and fully automatic packaging Equipment, etc., these equipment not only improve production efficiency, but also ensure the consistency and stability of product quality.

GB-T 5787 Hexagon Head Flange Bolts

GB-T 5787 Hexagon Head Flange Bolts

Testing Equipment

Jinan Star Fastener Company attaches great importance to product quality and is equipped with complete quality inspection equipment, such as tensile testing machines, torque testers,metallographic microscopes, optical projectors, salt spray test chambers, coating thickness gauges, etc., which are used to test the tensile strength and elongation of fastener products and evaluate the mechanical properties of products. These equipment ensure that every link from raw materials to finished products can be strictly controlled in quality.

GB-T 5787 Hexagon Head Flange Bolts

Packing

GB-T 5787 Hexagon Head Flange Bolts

Service

1. Provide customized GB/T 5787 hexagonal flange bolts according to customer specific needs and specifications. This includes selecting appropriate materials, sizes, thread specifications and surface treatments.

2. Fast delivery to ensure customers get the bolts they need in time. Develop reasonable production and delivery plans based on customer order volume and delivery time requirements.

3. Professional technical support, including guidance on bolt installation, use and maintenance. Help customers ensure the correct use of bolts to increase their lifespan and safety.

FAQ


1. How do you ensure product quality?

Manufacturers can provide relevant quality certification documents to prove the quality and reliability of the product. At the same time, samples can also be provided for customers to test to ensure that the products meet customer expectations and requirements.

2. Can you give me the best price?

We welcome you to inquire with us based on the customer's order volume and delivery time requirements, and we will provide a reasonable price quotation.

3. Can you ship the goods as soon as possible?

Manufacturers can formulate reasonable production and delivery plans based on customers' delivery requirements to shorten delivery time as much as possible. They can also provide expedited services to meet customers' urgent needs.

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