Corky textured, soft lightweight wood that is strong and touch with a low rate of shrinkage. Since it cuts easily in all directions, it can be used to make patterns, for carving, for trim, siding and doors.
Pinhole
A small hole in a coating, foil, membrane, or other material.
Pinholing (pitting)
Paint defect, often caused by air bubbles, which pits the painted surface, most commonly when paint is sprayed. The trapped air bubbles break, leaving a small hole in the paint surface. Slowly evaporating solvents can also cause this problem. Multiple coats of paint help to prevent it.
Pinion
Small diameter gear that is engaged with a larger gear to be used, for example, in transmissions.
Pinnacle
Projecting or ornamental cap on the high point of a roof.
Pinnate leaf
A series of leaflets arranged on either side of a central stalk.
Pinned file teeth
Material particle clogged file teeth.
Pintle
(1) Pin or bolt upon which another part turns. (2) Vertical peg used as a hinge pin on a gate. (3) Wood post base of cast iron or metal.
Pipe
A cylindrical hollow tube, used to convey water, gas, oil, water, etc, which come in varying materials, thicknesses and lengths. Natural gas and steam pipes up to 750 degrees F are made of carbon steel. Chrome-molybdenum low alloy steel is often used for temperatures above 750 degrees F. Water pipe is most often made of polyvinyl chloride. Some stainless steels, for example grave 311 H stainless, are also used for high temperatures while other stainless steels are used when pipe systems must be kept clean.
Pipe boot
A prefabricated flashing piece used to flash around circular pipe penetrations. Also known as a Roof Jack. Click here for an example.
