let the world have no hard to do screws

Global Non-standard Customized Fastener Solution Expert

Home > Products > Micro Screw >

Hexagon socket head screws

Hexagon socket head screws

Hexagon socket head screws
Hexagon socket head screwsHexagon socket head screwsHexagon socket head screwsHexagon socket head screwsHexagon socket head screws
CategoriesMicro Screw
AlbumView larger image
Update Time2019-11-15
Detail Information
Details





The national standard for hexagon socket head screws is the 


national standard gb70-1985. There are many specifications 


and sizes. The commonly used specifications and standards 


are 3*8, 3* 10,3 * 10,3 * 12,3 *8, 3*8, 4* 10,4 * 12,4 *30, 4* 5, 


5* 10,5 * 12,5 * 16,5 * 20,5 * 25,6 * 12,6 * 14,6 * 16,6 * 25,8 * 


14,8 * 16,8 *30,8 times 35,8 times 40 and so on.

hardness
Hexagon socket bolts according to the hardness of the screw wire, tension, yield strength is a grade classification, that is, the level of hexagon socket bolts, hexagon socket bolts is what level.Different product materials require different grades of hexagon socket bolts corresponding to it, all hexagon socket bolts have the following grades:
Hexagon socket bolts are classified into ordinary and high strength according to grade strength.Ordinary hexagon socket bolts refer to grade 4.8, while high-strength hexagon socket bolts refer to grade 8.8 or above, including grade 10.9 and 12.9.Hexagon socket bolts of class 12.9 generally refer to black hexagon socket cup head screws with knurled, natural color and oil.
Hexagon socket bolts used for steel structure connection have more than 10 grades, including 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9 and 12.9, of which 8.8 and above bolts are made of low carbon alloy steel or medium carbon steel and have been heat treated (quenching and tempering). They are generally referred to as high-strength bolts and the rest are ordinary bolts.The grade of bolt performance is composed of two Numbers, which respectively represent the nominal tensile strength and the ratio of buckling strength of bolt materials.

 

 

Rib specification

The head size

Hexagon inside size

Nominal length

φd

Diameter φD

Highly K

s

l

M1.6

3

1.6

1.5

2.5-16

M2

3.8

2

1.5

3-20

M2.5

4.5

2.5

2

4-25

M3

5.5

3

2.5

5-30

M4

7

4

3

6-40

M5

8.5

5

4

8-50

M6

10

6

5

10-60

M8

13

8

6

12-80

M10

16

10

8

16-100

M12

18

12

10

20-120

M14

21

14

12

25-140

M16

24

16

14(12)

25-160

M20

30

20

17(14)

30-200

M24

36

24

19(17)

40-200

M30

45

30

22(19)

45-200

M36

54

36

27(24)

55-200

Related Products
    Please send your message to us
    *Email
    Name
    Tel
    *Title
    *Content

    Agree to use terms of service