stack:The portion of the blast furnace above its widest cross-section is called stack.

Bosh:The portion of the blast furnace below its widest cross-section is called bosh.

Throat: The charge is fed into the blast furnace through the throat.

Hearth: The hearth is the lowest, but the most important part of the blast furnace.

Adjustable screw plate die is used for chasing or reconditioning
Round Adjustable Dies are used to cut right hand external threads, both initial threads and in the repair and maintenance of rusty or worn threads. They are made with a slot in the circumference and a special screw to allow for cutting a slightly smaller size.

Zinc is used for galvanizing iron sheets so that they do not rust.

The process of beveling the end of a hole is called Counter sinking.