Hexagon socket button head screws
The definition of Hexagon socket button head screws refers to a screw with a hexagon socket and a flat round head. The professional name for the screw industry is called a flat cup, which is a relatively simple overview. It is also known as an hexagon socket round cup and hexagon socket button head bolt. There are many terms, but the content is the same.
|
Thread size（d） |
M3 |
M4 |
M5 |
M6 |
M8 |
M10 |
M12 |
|
|
P |
pitch of screws |
0.5 |
0.7 |
0.8 |
1.0 |
1.25 |
1.5 |
1.75 |
|
dk |
Maximum |
5.70 |
7.60 |
9.50 |
10.50 |
14.00 |
17.50 |
21.00 |
|
minimum |
5.40 |
7.24 |
9.14 |
10.07 |
13.57 |
17.07 |
20.48 |
|
|
k |
Maximum |
1.65 |
2.20 |
2.75 |
3.30 |
4.40 |
5.50 |
6.60 |
|
minimum |
1.40 |
1.95 |
2.50 |
3.00 |
4.10 |
5.20 |
6.24 |
|
|
s |
nominal |
2.0 |
2.5 |
3.0 |
4.0 |
5.0 |
6.0 |
8.0 |
|
Maximum |
2.060 |
2.580 |
3.080 |
4.095 |
5.140 |
6.140 |
8.175 |
|
|
minimum |
2.020 |
2.520 |
3.020 |
4.020 |
5.020 |
6.020 |
8.025 |
|
|
t |
minimum |
1.04 |
1.30 |
1.56 |
2.08 |
2.60 |
3.12 |
4.16 |
There are two types of materials for Hexagon socket button head screws. These two types of materials are commonly used, including stainless steel and carbon steel. We generally refer to carbon steel as iron. Carbon steel is classified by grade hardness, including low carbon steel, medium carbon steel, and high carbon steel. Therefore, the strength grades of Hexagon socket button head screws include 4.8, 8.8, 10.9, and 12.9.
Hexagon socket button head screws, if they are made of iron, generally require electroplating. Electroplating can be divided into environmental protection and non environmental protection, and non environmental protection means ordinary electroplating. Environmental protection includes environmental protection blue zinc, environmental protection color zinc, environmental protection nickel, environmental protection white zinc, etc. Non environmental protection electroplating includes black zinc, white zinc, color zinc, white nickel, black nickel, black coating, etc.
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