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Key Washers
Key washers are precision-engineered locking devices that prevent rotational loosening of fasteners under dynamic or vibratory aerospace loads, typically featuring internal or external tabs, tangs, or lugs that locate against a shaft, keyway, or component face. Manufactured from corrosion-resistant alloys to AMS and NAS specifications, they are commonly formed by stamping or fine blanking and may receive cadmium, zinc–nickel, or anodic surface treatments for environmental protection.
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