Nord-Lock M20 FZB Washer for Bromma YTS 45

The Nord-Lock M20 FZB washer, part number 70919, serves as a locking component for bolted connections. It features a wedge-locking design with cam-faced surfaces that utilize tension rather than friction to maintain bolt preload. The M20 designation indicates compatibility with 20mm metric fasteners, while the FZB finish provides a zinc-flake coating for the assembly. This component is engineered to prevent the loosening of fasteners subjected to dynamic loads and vibrations in industrial equipment.

This specific washer is utilized in the Bromma YTS 45 Fixed Guide Arm. The manufacturer of this part is Nord-Lock. In the context of spreader systems and container handling machinery, these washers are used to maintain the integrity of structural connections that experience frequent movement and operational stress. By ensuring that bolted joints remain tight, the component supports the structural stability of the guide arm assembly during container handling operations.

Locking washers of this type are used in heavy machinery to secure critical joints where standard fasteners might otherwise loosen due to mechanical vibrations. The wedge-locking mechanism creates a force greater than the forces attempting to loosen the bolt, ensuring the connection remains secure throughout the operational cycle of the machine.