2D Drawing Representation Questions

• This is a rounded exterior blend between surfaces:
• These are used to attach parts to a cylinder so they won't turn on it:
• This is a conical-shaped recess around a hole, often used to receive a tapered screw head:
• This is an angled surface used on cylinders to make them easier to handle:
• This is a flat or rounded tab protruding from a surface, usually to provide a method for attachment:
• This is a hollow cylinder that is often used as a protective sleeve or guide or as a bearing:
• A keyway is a small groove cut around the diameter of a cylinder, often where it changes diameter.
• Small curves called runouts are used to represent fillets that connect with plane surfaces tangent to cylinders.
• It is not always possible to show all of the drawing views in alignment on a sheet.
• Right-hand and left-hand parts are mirror images and are made to be interchangeable.
• A counterbore is a cylindrical recess around a hole, usually to receive a bolt head or nut.
• When a curved surface intersects a plane surface, an edge is formed.
• Simplified conventional representations that deviate from true orthographic projection may be used to enhance economy and clarity in a drawing.
• If a plane intersects a contoured surface, no line is drawn to represent the edge.
• A boss is a short raised protrusion above the surface of a part.
• A plane surface cannot intersect or be tangent to a contoured surface.
• A lug is a flattened collar or rim around a cylindrical part to allow for attachment.
• Knurl is a pattern form on a surface to provide for better gripping or more surface area for attachment.
• A fillet is a rounded exterior blend between surfaces.