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Chinese Professional Duplex Flange Bolt - DIN7991 Hex Socket Flat Head CSK Screw Grade Stainless Steel 304 316 A2-70 A4-80 – Hongji

Chinese Professional Duplex Flange Bolt - DIN7991 Hex Socket Flat Head CSK Screw Grade Stainless Steel 304 316 A2-70 A4-80 – Hongji Featured Image
  • Chinese Professional Duplex Flange Bolt - DIN7991 Hex Socket Flat Head CSK Screw Grade Stainless Steel 304 316 A2-70 A4-80 – Hongji
  • Chinese Professional Duplex Flange Bolt - DIN7991 Hex Socket Flat Head CSK Screw Grade Stainless Steel 304 316 A2-70 A4-80 – Hongji
  • Chinese Professional Duplex Flange Bolt - DIN7991 Hex Socket Flat Head CSK Screw Grade Stainless Steel 304 316 A2-70 A4-80 – Hongji
  • Chinese Professional Duplex Flange Bolt - DIN7991 Hex Socket Flat Head CSK Screw Grade Stainless Steel 304 316 A2-70 A4-80 – Hongji
  • Chinese Professional Duplex Flange Bolt - DIN7991 Hex Socket Flat Head CSK Screw Grade Stainless Steel 304 316 A2-70 A4-80 – Hongji

Chinese Professional Duplex Flange Bolt - DIN7991 Hex Socket Flat Head CSK Screw Grade Stainless Steel 304 316 A2-70 A4-80 – Hongji

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Chinese Professional Duplex Flange Bolt - DIN7991 Hex Socket Flat Head CSK Screw Grade Stainless Steel 304 316 A2-70 A4-80 – Hongji Detail:

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Hex Socket Button Head Screw Zinc Plated 5
ISO7380 Hex Socket Pan Head Screw Grade8

d

M3

M4

M5

M6

M8

M10

M12

M16

P

Pitch

0.5

0.7

0.8

1

1.25

1.5

1.75

2

a

Max

1

1.4

1.6

2

2.5

3

3.5

4

Min

0.5

0.7

0.8

1

1.25

1.5

1.75

2

dk

Max

5.7

7.6

9.5

10.5

14

17.5

21

28

Min

5.4

7.24

9.14

10.07

13.57

17.07

20.48

27.48

e

Min

2.303

2.873

3.443

4.583

5.723

6.863

9.149

11.429

k

Max

1.65

2.2

2.75

3.3

4.4

5.5

6.6

8.8

Min

1.4

1.95

2.5

3

4.1

5.2

6.24

8.44

s

Nominal

2

2.5

3

4

5

6

8

10

Max

2.08

2.58

3.08

4.095

5.14

6.14

8.175

10.175

Min

2.02

2.52

3.02

4.02

5.02

6.02

8.025

10.025

t

Min

1.04

1.3

1.56

2.08

2.6

3.12

4.16

5.2

Minimum tension load(N) 

8.8Grade

3220

5620

9080

12900

23400

37100

53900

100000

10.9Grade

4180

7300

11800

16700

30500

48200

70200

130000

12.9Grade

4910

8506

13800

19600

35700

56600

82400

154000

Detail description

Hex Socket Button Head Screw Zinc Plated 5
ISO7380 Hex Socket Pan Head Screw Grade9

There are many types of screws, one is called hexagon socket screws. When purchasing, the salesperson will also ask you which type to choose. Originally, there are many classifications of hexagon socket screws.

There are several types of hexagon socket screws
1. There is a type of hexagon socket screw called pan head. After the screw is installed, its head protrudes on the surface, which makes it more convenient to screw the screw later. This product can be seen on some household appliances.

2.There are countersunk head hexagon socket screws, which means that it will not protrude from the surface after screwing, and it will not affect the appearance. However, if there is a problem that is difficult to screw when screwing, the screw cannot be started.

3.There are also cylindrical head hexagon socket screws, which are similar to the second type of screws. They are relatively strong and require a wrench of the corresponding specification to remove the screws. Generally speaking, they are used on machine tools.

The screw is rusted and can’t be unscrewed, what should I do?
In life, many friends have encountered similar problems. Once the screws are rusted, no matter how much effort is used, they cannot be unscrewed. Because the screw is exposed to the air, if the surrounding environment is relatively humid, after a long time, it is prone to rust. In fact, don’t use brute force, you need to master the skills of screwing.

Tap it first, tap the corroded screw with a wrench, and tap the handle lightly, because if the corroded part is loose, it can be unscrewed later.

If it still doesn’t work after tapping, you can drop a small amount of oil, and then rotate it gently with the wrench a few times. If you don’t have oil at home, you can also use Coke because it will remove rust.

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Yongnian Hongji
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Product detail pictures:

Chinese Professional Duplex Flange Bolt - DIN7991 Hex Socket Flat Head CSK Screw Grade Stainless Steel 304 316 A2-70 A4-80 – Hongji detail pictures

Chinese Professional Duplex Flange Bolt - DIN7991 Hex Socket Flat Head CSK Screw Grade Stainless Steel 304 316 A2-70 A4-80 – Hongji detail pictures

Chinese Professional Duplex Flange Bolt - DIN7991 Hex Socket Flat Head CSK Screw Grade Stainless Steel 304 316 A2-70 A4-80 – Hongji detail pictures

Chinese Professional Duplex Flange Bolt - DIN7991 Hex Socket Flat Head CSK Screw Grade Stainless Steel 304 316 A2-70 A4-80 – Hongji detail pictures

Chinese Professional Duplex Flange Bolt - DIN7991 Hex Socket Flat Head CSK Screw Grade Stainless Steel 304 316 A2-70 A4-80 – Hongji detail pictures

Related Product Guide:
Our products are broadly identified and trustworthy by people and may meet continually modifying financial and social requires of Chinese Professional Duplex Flange Bolt - DIN7991 Hex Socket Flat Head CSK Screw Grade Stainless Steel 304 316 A2-70 A4-80 – Hongji , The product will supply to all over the world, such as: Tunisia, azerbaijan, United States, Our qualified engineering team will usually be prepared to serve you for consultation and feedback. We've been able to also deliver you with absolutely free samples to meet your needs. Best efforts might be made to offer you the ideal service and items. For anyone who is interested in our company and products, be sure to make contact with us by sending us emails or contact us right away. In order to know our solutions and organization. ar more, you can come to our factory to determine it. We are about to usually welcome guests from around the globe to our corporation. o create small business relations with us. Please genuinely feel no cost to speak to us for enterprise. nd we believe we have been gonna share the most effective trading practical experience with all our merchants.
    • We are a small company that has just started, but we get the company leader's attention and gave us a lot of help. Hope we can make progress together!
    5 Stars By Judith from Grenada - 2017.01.11 17:15
    The customer service staff's answer is very meticulous, the most important is that the product quality is very good, and packaged carefully, shipped quickly!
    5 Stars By Queena from Provence - 2017.11.29 11:09
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