Mechanics: crush washer
Self-tutoring about mechanics: the tutor mentions the idea of a crush washer.
A crush washer is used to provide a seal. It does so by deforming as it’s compressed between two surfaces, such that it compensates for their idiosyncrasies. Therefore, the crush washer is meant to be softer than the two surfaces it’s between.
Source:
Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.
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