Hardened washer for National Crane 900

The hardened washer, part number 978509, functions as a structural fastening component within National Crane machinery. It distributes the clamping force of bolts or nuts over a broader area, which reduces localized pressure on the mating surfaces of the assembly. By providing a stable bearing surface, it helps maintain the integrity of bolted connections in heavy equipment applications.

This component is compatible with the National Crane 900 crane. It is typically utilized in structural anchor points, boom connections, or stabilization systems where fasteners must support significant loads. The design ensures uniform contact, which assists in maintaining the required tension of the fastener and prevents surface damage during operation.

In heavy machinery, hardened washers are used to prevent the deformation of contact surfaces under high-torque conditions. They are engineered to resist the stresses associated with structural joints, ensuring that connections remain secure despite the operational vibrations and loads common in lifting equipment.