Boss
Engineering
A small projection from the body of a piece, the end of which is surfaced to form a seating; or it is metal added to thicken a plate about a hole. The central body of a propeller wheel which supports the blades.
A small projection from the body of a piece, the end of which is surfaced to form a seating; or it is metal added to thicken a plate about a hole. The central body of a propeller wheel which supports the blades.