27f58cad___Academy_of_Aerospace_Quality__Section
[Term] Washer [Definition] A flat disk, as of metal, plastic, rubber, or leather, placed beneath a nut or at an axle bearing or a joint to relieve friction, prevent leakage, or distribute pressure [Source] http://www.thefreedictionary.com/washer [Section] 
Fasteners
Glossary | Academy of Aerospace Quality
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