The DIN 571 Hex Head Coach Lag Wood Screw, also known as a “hex lag screw,” is a heavy-duty fastener designed for metal-to-timber connections or joining heavy timbers. It features a square or hexagonal head, which can be tightened using a wrench, spanner, or pliers. These screws are commonly used in construction, woodworking, and other applications where robust connections are essential.
Product Data
Size
s
e
k
ds
d1
min
max
min
min
max
min
max
min
max
M4
6.64
7
7.5
2.5
2.8
3.52
4
3.52
4
M5
7.64
8
8.63
3.13
3.5
4.52
5
4.52
5
M6
9.64
10
10.89
3.63
4
5.52
6
5.52
6
M7
11.57
12
13.07
4.63
5
6.42
7
6.42
7
M8
12.57
16
14.2
5.13
5.5
7.42
8
7.42
8
M10
16.57
17
18.72
6.55
7
9.42
10
9.42
10
M12
18.48
19
20.88
7.55
8
11.3
12
11.3
12
M16
23.16
24
26.17
9.55
10
15.3
16
15.3
16
M20
29.16
30
32.95
12.1
13
19.3
20
19.16
20
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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