Linch pins are specifically designed to retain a wheel or other rotating device on its axle, but can be used as a fastener as well. Both of these types of pins require mating holes and some form of a ...

These headless, hollow fasteners have a slot that runs longitudinally down the length of the pin. Various types of specialty and proprietary spring pins are also available. Often, these spring pin ...

Theoretically, all types of decorative pins are allowed in carry-on and checked baggage on flights in the United States. The TSA specifies stick pins and safety pins are welcomed aboard a plane.