The characteristic of the Half Round Head Square Neck Bolt is that the head is made into a semi-spherical shape, and a square neck is made under the head. On the connected parts connected by this bolt, a square hole should also be made accordingly. When this bolt is inserted into the connected parts and the nut is screwed on, the bolt will not rotate due to the square neck. Its head is relatively smooth and it is not easy to hook other objects. This bolt is mostly used in trucks, barges, iron and wood looms, and other wooden structural parts. Because the head has a large bearing surface, it is not easy to sink into the wooden connected parts.
Product Data
Specification
d
M6
M8
M10
M12
M14
M16
M20
b
L≤125
18
22
26
30
34
38
46
125≤L≤200
/
28
32
36
40
44
52
dk
max
15.10
19.10
24.30
29.30
33.60
36.60
45.60
min
13.30
17.30
22.16
27.16
31.00
34.00
43.00
K1
max
4.40
5.40
6.40
8.45
9.45
10.45
12.55
min
3.60
4.60
6.60
7.55
8.55
9.55
11.45
k
max
3.48
4.48
5.48
6.48
7.9
8.90
10.90
min
2.70
3.60
4.60
5.60
6.55
7.55
9.55
S
max
6.30
8.36
10.36
12.43
14.43
16.43
20.52
min
5.84
7.80
9.80
11.76
13.76
15.76
19.72
Applications
Building Insulation: Primarily used in the installation of thermal insulation systems in residential, commercial, and industrial buildings.
External Wall Insulation: Often used in External Thermal Insulation Composite Systems (ETICS) to fix insulation boards to external walls.
Roof Insulation: Suitable for securing insulation materials on roofs to enhance energy efficiency and thermal performance.
Floor Insulation: Utilized in floor insulation systems to prevent heat loss through the flooring and improve overall energy efficiency.
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