Which component helps to reduce wear between moving parts?

The component that helps to reduce wear between moving parts is the washer. Washers serve multiple purposes in mechanical assemblies, one of which is to provide a smooth surface that can minimize friction when components are in motion. This reduced friction leads to less wear on the surfaces of the moving parts, thus extending their lifespan and ensuring that they function more efficiently.

In many applications, washers also help to distribute the load of a fastener, which can further contribute to reducing wear and tear by preventing localized deformation. Additionally, washers can protect against the loosening of components due to vibration, which can also indirectly help in reducing wear over time.

Other options, such as nuts, bolts, and lagging pads, have their own specific functions but do not primarily focus on reducing wear between moving parts in the same way that washers do. For instance, nuts and bolts are primarily used to secure components together, whereas lagging pads are typically associated with cushioning or dampening vibrations rather than minimizing wear directly.