Collated nails are fasteners held together in a series with plastic or wire strips

Combustible is a term to describematerial in a liquid or solid form that will ignite at a flashpoint of over 100 degrees

A common stud is a full-length vertical framing component placed on layout at regular intervals between the top and bottom plates. Common studs are always identical lengths in a wall panel.

A compound angle is a miter angle and a bevel angle combined into one cut

A compound miter saw is a fixed base saw with hinged motor and blade for precise square and angled cuts in materials

The condensation drain valve is a valve at the bottom of tank for draining of moisture that collects

A conductor is asingle wire that conducts electricity from one connection to another in a circuit

A conduit is a metal or plastic tube used to protect conductors from weather and abrasion that are not concealed within the walls, floor, or ceiling of a structure

Conspicuity is a term to describe something that is

 easily seen or noticed; readily visible or observable and attracting special attention

Continuity is a continuous electrical path that allows unrestricted flow of current