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HVAC wedge lock washer For high-strength structural bolting assemblies
HVAC wedge lock washer For high-strength structural bolting assemblies - 1
HVAC wedge lock washer For high-strength structural bolting assemblies - 2
HVAC wedge lock washer For high-strength structural bolting assemblies - 3

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HVAC wedge lock washer For high-strength structural bolting assemblies

Steel, zinc flake (ZFSHL)

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Applied and tightened both under the screw head and under the nut



Secures the screw connection against loosening


As a result of the surface pressure caused by the pretension on the screw head or nut support, during the tightening process the external radial ribs embed themselves in the screw head or nut support as well as in the corresponding counter support (component) due to their higher surface hardness. The screw or nut can then only rotate over the inside wedge surfaces of the HVAC washers. The wedge pitch is always larger than the respective thread pitch, which prevents unwanted loosening of the connection



To ensure that the wedge lock washers have the desired locking effect, the hardness of the connecting components may not be harder than the wedge lock washers themselves and 44HRC

Notice

Instead of the regular washers, HVAC washers are used in high-strength fittings. These washers are made of hexagonal screws and nuts of strength class 10.9 in accordance with DIN EN 14399-4 or DIN EN 14399-8, which correspond to k class K1 according to DIN EN 14399-1 (see Chapter 4.5).

General construction permit no. Z-14.4-702