If warpage raises the ends of clapboards, nail them flat again, using 6-penny (6d) galvanized box nails or 6-penny ring-shanked aluminum nails, if obtainable.

Siding Nails: Resemble box nails, but are usually threaded like drywall nails or have a spiral-shaped shank.

Because their coating increases their grip they are made one-eighth to a quarter-inch shorter than plain box nails having the same penny size.

Sinkers Cement-coated box nails.

Drive in one or more 3-penny (1 1/4-inch) box nails on the side opposite the tongue to supplement the glue.

Cement-coated box nails are called sinkers.

They resemble box nails, but are threaded and feature very sharp points.

Use two-inch drywall screws or eight-penny box nails (two and a half inches long) as fasteners.

Because the resinous coating provides increased holding strength, they are made one-eighth to one-quarter inch shorter than bright box nails of the same penny size.

Box Nails: Lighter and smaller in diameter than common nails, box nails are designed for light construction and household use.