A cut nail with a large flat cir­cular head. Small clout nails are called tacks.

Designation for Circular Mil. Also, centimeter.

Designation for Circular Mil Area.

Designation for Communications Plenum Cable.

Designation for Communications Riser Cable.

Designation for Computer Numerical Control.

Rope formed from large wires. Also known as hard-laid rope.

Either mild steel with clean bright finish for plating or plastic coating, galvanized with clean bright finish or PVC coated. It must be free from surface imperfections.

A copper conductor that has been coated with a metallic substance. A tin coating is applied to protect copper from chemical attack by sulfur-based insulation compounds; a nickel coating is sometimes used for conductors rated for extremely high temperatures.

Electrode used in arc welding in which the metal wire is coated with fluxing constituents.

Wire given a thin coating of metals such as tin, lead, nickel, etc. The coating is done by hot-dipping or plating, chemical or electrolytic. The coating is done for either corrosion protection or to improve other properties, such as adhesion to rubber or for appearance. Another material is PVC, often used as a coating for chain link fences. Special coatings also include the application of an insulator or dielectric to the surface of an electrical conductor for such applications as building wire, magnet wire, power distribution, high voltage, and telecommunications.

1) A material applied to the surface of a conductor to prevent environmental deterioration, facilitate soldering or improve electrical performance. 2) The process of covering steel with another material, primarily for corrosion resistance. 3) A protective layer of plastic put onto a fiber during drawing.

Blister that occurs in the coating or liner of clad products. It is evident only on that surface of the sheet, shape or tube containing the blistered liner.

An antique bronze finish can be obtained on coppered mild steel wire by cold dipping in a steel bronze solution. This produces a chocolate surface color, which can be relieved by scratch brushing and finally protected by a clear lacquer. Plain brass or copper wirework should first be cleaned by dipping in nitric acid. After cleaning the mesh should be either cold or hot lacquered.

Abbreviation for Coaxial Cable.

A cable consisting of two cylindrical conductors with a common axis, separated by a dielectric.

A connector that has a coaxial construction and is suitable for use with coaxial cable.

Element, chemical symbol Co. Gray magnetic metal of medium hardness with good corrosion resistance. Used as the bonding material in most cemented carbides, but also in ferrous alloys for high-grade tool and magnet steels.

1) A rolling mill line jam that occurs during rolling of various products such as nonferrous rod or wire and steel sheet. 2) A piece of steel which for any reason has become so bent or twisted that it must be withdrawn from the rolling operation and scrapped.

Short term for National Electrical Code.