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As a screw is tightened, these washers flatten to add tension to the joint and prevent loosening from small amounts of vibration.
As you tighten a bolt, these metric washers flatten to add tension to the threaded joint and prevent loosening from small amounts of vibration.
Choose these washers for their adherence to strict military standards for material and construction.
Compared to standard split lock washers, these are thicker and have larger outside diameters.