Hex Socket Countersunk Screw is a screw with a hexagonal drive and countersunk head design. The screw head has a hexagonal recess and requires a hexagonal wrench for installation and removal. The screw head is tapered to fully embed into the material being fastened, allowing the screw head to lie flush with the material surface, providing a smooth appearance. Widely used in construction, automotive and industrial applications, especially where a smooth surface is required or to prevent the screw head from protruding.
Product Data
Specification
Dia
M3
M4
M5
M6
M8
M10
M12
M14
Threads
0.5
0.7
0.8
1
1.25
1.5
1.75
2
dk
max
6
8
10
12
16
20
24
27
min
5.7
7.64
9.64
11.57
15.57
19.48
23.48
26.48
s
2
2.5
3
4
5
6
8
10
max
2.1
2.6
3.1
4.12
5.14
6.14
6.175
10.175
min
2.02
2.52
3.02
4.02
5.02
6.02
8.025
10.025
t
max
1.2
1.8
2.3
2.5
3.5
4.4
4.6
4.8
min
0.95
1.55
2.05
2.25
3.2
4.1
4.3
4.5
a
max
92°
min
90°
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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