A pin is a device used for fastening objects or material together.

A pin is a device used for fastening objects or material together. Pins often have two components: a long body and sharp tip made of steel, or occasionally copper or brass, and a larger head often made of plastic. The sharpened body penetrates the material, while the larger head provides a driving surface. It is formed by drawing out a thin wire, sharpening the tip, and adding a head. Nails are related, but are typically larger. In machines and engineering, pins are commonly used as pivots, hinges, shafts, jigs, and fixtures to locate or hold parts.

Pin is a 1988 Canadian thriller film starring David Hewlett, Cynthia Preston and Terry O'Quinn, directed by Sandor Stern. The film was released in Canada with the title Pin, A Plastic Nightmare. It was released direct-to-video in the USA on January 27, 1989. The running time is 102 minutes. It is based on the novel of the same name by Andrew Neiderman.