DIN 6916 (HV Washer) is a thickened, hardened washer specifically engineered for high-strength structural bolting assemblies. Its defining features include extreme hardness achieved through quenching and tempering, and a chamfered inner diameter designed to clear the underhead fillet of the bolt, allowing it to withstand the immense pre-load forces of Grade 10.9 bolts without deformation. It is a critical component in ensuring the safety and stability of heavy steel connections in bridges and high-rise buildings, preventing joint loosening and surface crushing.
Product Data
Specification
Thread
M12
M16
M20
M22
M24
M27
M30
M36
d(mm)
13
17
21
23
25
28
31
37
dc(mm)
24
30
37
39
44
50
56
66
h(mm)
3
4
4
4
4
5
5
5
c(mm)
1.6
1.6
2
2
2
2.5
2.5
3
e(mm)
0.5
1
1
1
1
1
1
1.5
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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