Trend UNI/CS Countersink

Diameter - A measurement across a circle passing through the middle

Steel - An alloy made predominately of Iron combined with <2% carbon

Carbon - A common element, in its simplest form is coal. The element can take different form from hard diamonds through graphite to soft carbon

Wood - A hard material found in trees. Used for tool making, fuel and construction.

cutting - The seperation of an object usually using a cutting tool such as a knife

Shell - A hard external structure or surface.

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