12.9 Grade Headless Cone Point Screw

12.9 Grade Headless Cone Point Screw

12.9-grade Headless Cone Point Screw Product Description : Hexagon socket taper screws are part of the connector. The headless hexagon socket is to be installed with a hexagonal wrench of the same size. The headless design makes the connected parts more beautiful and high-grade. Main material...
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Product Details

12.9-grade Headless Cone Point Screw

product photo.jpg

Product Description

Hexagon socket taper screws are part of the connector. The headless hexagon socket is to be installed with a hexagonal wrench of the same size. The headless design makes the connected parts more beautiful and high-grade.

Main material editor

At present, the standard parts on the market mainly include carbon steel, stainless steel and copper.

 

(1) Carbon steel. We distinguish low carbon steel, medium carbon steel and high carbon steel as well as alloy steel with the carbon content in carbon steel.

 

1. Low carbon steel C% ≤ 0.25% Domestically known as A3 steel. Foreign countries are basically called 1008, 1015, 1018, 1022 and so on. It is mainly used for products with no hardness requirements such as 4.8 bolts and 4-grade nuts and small screws. (Note: The drill tail nail is mainly made of 1022 material)

 

2, medium carbon steel 0.25% <C% ≤ 0.45% domestically known as 35, 45 steel, foreign countries are basically called 1035, CH38F, 1039, 40ACR and so on. Mainly used for 8-grade nuts, 8.8-grade bolts and 8.8-grade hexagon sockets.

 

3. High carbon steel C%>0.45%. Currently, it is basically not used in the market.

 

4. Alloy steel: Adding alloying elements to ordinary carbon steel to increase some special properties of steel: such as 35, 40 chromium molybdenum, SCM435, 10B38. The main screw is SCM435 chrome-molybdenum alloy steel. The main components are C, Si, Mn, P, S, Cr and Mo.

 

(2) Stainless steel. Performance grade: 45, 50, 60, 70, 80 Mainly divided into austenite (18% Cr, 8% Ni), good heat resistance, good corrosion resistance and good weld-ability. A1, A2, A4 marten-site, 13% Cr have poor corrosion resistance, high strength and good wear resistance. C1, C2, C4 ferritic stainless steel. 18%Cr has better forging properties and corrosion resistance is stronger than martensite. Mainly divided into SUS302, SUS304, and SUS316 by level.

 

(3) Copper. Common materials are brass, zinc-copper alloy. The market mainly uses H62, H65 and H68 copper as standard parts.

  

Surface treatment

1 galvanized (blue and white, multicoloured, black)

2. black

3. Phosphor

4. Hot dip galvanizing

12.9 grade Headless  Cone Point Screw-stainless steel.jpg


Product details:(Unit:mm)

dim..jpg


Spec

d

Pitch

P

dt

s

T

min

max

Nominal

diameter

max

min

M1.6

0.35

0.4

0.7

0.725

0.710

0.7

M2

0.4

0.5

0.9

0.913

0.887

0.8

M2.5

0.45

0.65

1.3

1.5

1.275

1.2

M3

0.5

0.75

1.5

1.58

1.52

1.2

M4

0.7

1

2

2.08

2.02

1.5

M5

0.8

1.25

2.5

2.58

2.52

2

M6

1

1.5

3

3.08

3.02

2

M8

1.25

2

4

4.095

4.02

4

M10

1.5

2.5

5

5.14

5.02

4

M12

1.75

3

6

6.14

6.02

4.8

M16

2

4

8

8.175

8.025

6.4

M20

2.5

5

10

10.175

10.025

8




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