| | DC plug (Site not responding. Last check: 2007-10-31) |
 | | DC plug is the common name for a DC power supply plug, and particularly is used for one common type of cylindrical two-conductor plug available in a range of sizes and used to power small pieces of electronic equipment. |
 | | Slightly smaller 5.0mm OD plugs are sometimes used in both 2.1mm and 2.5mm pin sizes, as are longer or shorter 5.5mm OD plugs. |
 | | Use of a plug designed for a larger pin, for example a 2.5mm pin plug in a 2.1mm pin jack, may work perfectly depending on the design of the jack, but often the result is an unreliable contact or occasionally no contact at all. |
| bopedia.com /en/wikipedia/d/dc/dc_plug.html (1179 words) |