Jiangsu Huaxin Steel Co., Ltd.
Hex Flange Bolt

Grade 8.8 Flange Bolt
The strength grade of flange bolts is selected according to the working pressure. If the working pressure is less than 1Mpa, you can choose grade 4.8, and if it isbetween 1~4.5Mpa, you can choose grade 8.8 high-strength bolts.

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Mechanical Properties

Grade 8.8 Flange Bolt Product Introduction

 

As a manufacturer located in China, we offer our customers quality and durable products that are made with high-grade materials. Our product, the Grade 8.8 Flange Bolt is no exception. This bolt is the perfect solution for any construction project that requires strength and reliability.

 

The primary selling point of our Grade 8.8 Flange Bolt is its strength. This bolt is made from high-quality steel that has been heat-treated to ensure its 8.8 grade rating. A bolt's grade rating is important because it indicates the level of strength that the bolt can withstand before breaking. The higher the grade rating, the stronger the bolt. Therefore, our Grade 8.8 Flange Bolt is well-suited for use in high-stress applications and in situations where the bolt must be able to withstand extreme vibrations or impact.

 

Our Grade 8.8 Flange Bolt has a flanged head, which sets it apart from other bolts on the market. The flanged head is designed to distribute the load more evenly across the surface area of the bolt, providing extra support and resistance to pull-out. This feature makes our product less likely to come loose over time, which is critical in applications where absolute security is needed.

 

One key aspect of our bolt is that it's available in a variety of sizes, which makes it versatile and broadens the range of applications it can be used in. Whether your customer needs a bolt for a small project or a massive construction project, the Grade 8.8 Flange Bolt is able to meet their requirements. We offer sizes ranging from M6 to M30, so there's a size for every need.

 

Quality assurance is always front of mind when we manufacture our products. The use of substandard materials can result in defective bolts that are either prone to failure or are not sturdy enough to do the job. That's why we source our materials from reliable and quality-checked suppliers. We also maintain strict quality controls throughout the manufacturing process to ensure that our products always meet industry standards.

 

Our Grade 8.8 Flange Bolt is also resistant to corrosion. This is a crucial feature in a bolt, as bolts that are exposed to moisture and other elements can rust over time, which weakens their strength and can cause them to fail. Our bolt is coated using a specially-formulated zinc plating, which provides corrosion resistance that outlasts other coatings.

 

When you order our Grade 8.8 Flange Bolt, you'll receive a low-maintenance, high-strength product that will provide your customer years of use, with little to no need for replacement. It's an affordable choice that won't break the bank but also won't skimp on quality.

 

In summary, the Grade 8.8 Flange Bolt from our company is a high-grade product that is perfect for a range of construction applications. Its key features, including a flanged head, strength, variety of sizes, quality material, and corrosion resistance, make it a must-have for any builder or contractor. For quality, durability, and dependability, choose our Grade 8.8 Flange Bolt for your next project.

 

The strength grade of flange bolts is selected according to the working pressure. If the working pressure is less than 1Mpa, you can choose grade 4.8, and if it isbetween 1~4.5Mpa, you can choose grade 8.8 high-strength bolts.


Production Process of Hex Flange Bolts

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Specification of Hex Flange Bolts

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d

M5

M6

M8

M10

M12

M14

M16

M20

P

Thread Pitch

Coarse Thread

0.8

1

1.25

1.5

1.75

2

2

2.5

Fine Thread 1

/

/

1

1.25

1.5

1.5

1.5

1.5

Fine Thread 2

/

/

/

1

1.25

/

/

/

b

L≤125

16

18

22

26

30

34

38

46

125<L≤200

/

/

28

32

36

40

44

52

L>200

/

/

/

/

/

/

57

65

c

MIN

1

1.1

1.2

1.5

1.8

2.1

2.4

3

da

Max

5.7

6.8

9.2

11.2

13.7

15.7

17.7

22.4

dc

MAX

11.8

14.2

18

22.3

26.6

30.5

35

43

ds

MAX

5

6

8

10

12

14

16

20

MIN

4.82

5.82

7.78

9.78

11.73

13.73

15.73

19.67

du

MAX

5.5

6.6

9

11

13.5

15.5

17.5

22

dw

MIN

9.8

12.2

15.8

19.6

23.8

27.6

31.9

39.9

e

MIN

8.71

10.95

14.26

16.5

17.62

19.86

23.15

29.87

f

MAX

1.4

2

2

2

3

3

3

4

k

MAX

5.4

6.6

8.1

9.2

11.5

12.8

14.4

17.1

k1

MIN

2

2.5

3.2

3.6

4.6

5.1

5.8

6.8

r1

MIN

0.25

0.4

0.4

0.4

0.6

0.6

0.6

0.8

r2

MAX

0.3

0.4

0.5

0.6

0.7

0.9

1

1.2

r3

MIN

0.1

0.1

0.15

0.2

0.25

0.3

0.35

0.4

r4

3

3.4

4.3

4.3

6.4

6.4

6.4

8.5

s

MAX=Nominal Size

8

10

13

15

16

18

21

27

MIN

7.78

9.78

12.73

14.73

15.73

17.73

20.67

26.67

Common Grade and Coating

Standard

Material

Grade

Finish

Thread

DIN933 DIN931 ISO4014 ISO4017 ASME B 18.2.1

carbon steel

4.6 4.8 5.8 8.8 10.9 12.9 A2-70 A4-70

Plain

UNC

Zinc plated

Alloy steel

Yellow zinc plated

PTFE

Stainless steel

Black Oxide

UNF

Dacromet

Other

HDG

Other

Application Area of Hex Flange Bolts

The flange bolt is composed of a hexagonal head and flange plate, its support area to stress area word ratio is larger than that of other bolts, so the flange bolt can withstand higher pre-tightening force and has better anti-loosening performance.

Therefore high-strength flange bolts above grade 8.8 are often used in key structures such as highways and railway bridges, industrial and civil buildings, towers, and hoisting machinery.

In some infrastructure fields such as machinery and equipment, petrochemicals, automobile manufacturing, and pressure pipelines, ordinary flange bolts with grade 4.8 are widely used.

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Why choose us?

  • Our prices are highly competitive, making us an excellent choice for those on a budget.
  • We sincerely welcome overseas customers to consult for the long-term cooperation and the mutual development.
  • Our products are of the highest quality, and we provide excellent service to our customers.
  • In order to maximize long-term profits, we always obey the highest moral standards.
  • Our Hex Flange Bolt products are celebrated for their durability, reliability, and strength.
  • Our industrial structure has been continuously optimized, our overall competitiveness has been further strengthened, and our brand image has been significantly enhanced.
  • Our factory strictly adheres to all safety and quality regulations to ensure the safety of our customers.
  • We will use mature technology and advanced equipment to meet the various requirements of our customers for our Grade 8.8 Flange Bolt.
  • We have a flexible production schedule to meet our customers' timing needs.
  • We vigorously promote structural adjustment and continuously increase new product development, and win market recognition and customers' trust with high and stable product quality and short delivery time.

Packaging and Transportation

PACKAGE:
Standard export seaworthy packing.
DELⅣERY TIME:
3-20 days after confirming order, detail delivery data should be decided according to production season and order quantity.

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About us

Jiangsu Huaxin Steel Co., Ltd. has been engaged in steel industry for more than 20 years, and Every staff in the company with more than 8 years international trade experience.

Main products include stainless steel sheet, stainless steel coil, stainless steel pipes, stainless steel bars, stainless steel strips,stainless steel channels,stainless steel angles and stainless steel I beam H beam etc,aluminum coil,aluminum sheet,aluminum pipes,copper plate, copper coil, copper rod,copper tube,galvanized coil,galvanized sheet, galvanized pipes etc.Mainly exported to Southeast Asia, North Africa and Middle East market such as Korea, Vietnam, Thailand, Myanmar, Philippines, Singapore, Jordan, Dubai and Kuwait,etc.

Our company introduced the advanced German equipment, whose annual production capacity is 730,000 tons. There is all kinds of products about 100000 tons. It will shorten you delivery time 10-15 days and reduce your cost about 3-5 us dollars/ton.

Our strategic suppliers of raw material are Tisco Baosteel Ansteel etc.All raw materials will be verified before putting into our storage to ensure raw materials and finished products quality.

We have our own lab, professional testing equipment and team, and all set of ISO certification will guarantee the quality of your product (raw material inspection, supervision of production process, appearance inspection and inspection for the finished products) .We will provide our distinctive packing for free which improves the protection rate of goods by 30%. Besides, we accept customized packing.

We warmly welcome customers from all over the world,and looking forward to establishing a long term mutual beneficial relationship for a bright future together.

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FAQ

Q1 : How do you control quality ?

A1 : Mill Test Certification is supplied with shipment, Third Party Inspection is available. and we also get ISO,SGS,Alibaba Verified.

Q2 : How many countries you already exported ?
A2 : Exported to more than 50 countries mainly from America, Russia, UK, Kuwait, Egypt, Turkey, Jordan,India, etc.

Q3 : What are the advantages of your company ?
A3 : We have many professionals, technical personnel, more competitive prices and best after-deals service.

Q4: Can you provide sample ?
A4: We can provide the small samples in stock for free, as long as you contact us.Customized samples will take about 5-7days.

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