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A short length of pipe having an MIP thread at both ends is sometimes called a nipple. Typically, the airflow through a ductwork connection is from male to female. As an illustrative example of some design tradeoffs in power connector selection, consider the adjacent picture. Variant usages[ edit ] In the UK, many Commonwealth countries and some non-English-speaking countries[ where? A commonly seen coaxial power connector is usually set up so that power is fed from the female plug on the right into the male jack on the left which is typically a part of the electronic device accepting the power. Abbreviations and alternate terminology[ edit ] The standard letters "M" and "F" are commonly used in part numbers to designate connector gender. For example, in Switchcraft XLR microphone or hydrophone connectors, the part numbers are denoted as follows: These mating surfaces are mounted into identical fittings which can freely mate with any other, without regard for gender provided that the size and type are already matched. Stackable connectors are not classified as hermaphroditic in the strictest sense, but are often described as such in looser usage. Alternative names include hermaphrodite, androgynous , genderless, sexless, combination or combo , two-in-one, two-way, and other descriptive terms. A male 50 ohm BNC connector plug.
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As an illustrative example of some design tradeoffs in power connector selection, consider the adjacent picture. The designer of a connection system may use one or both schemes to allow arbitrary connectivity, or even combine both schemes into a single system. A male threaded pipe, Right: Male connector pins are often protected by a shell also called a shroud, surround, or shield , which may envelop the entire female connector when mated. Power is provided by the female plug on the right to the male jack on the left; the exposed conductors are not hazardous due to the low voltage. In the case of electrical power connections, designers do not reverse connector gender in such a casual fashion, because exposing live AC line power on male connectors is unsafe and generally illegal. Stackable connectors are not classified as hermaphroditic in the strictest sense, but are often described as such in looser usage. In many cases these terms are more common than male and female, especially in documentation intended for the non-specialist. Hermaphroditic connections, which include both male and female elements in a single unit, are used for some specialized tubing fittings, such as Storz fire hose connectors. In a different design, if the power adapter were intended to supply a voltage sufficient to cause electrical shock, the semi-exposed center contact of the female plug would be considered unacceptably hazardous, requiring a different choice of power connector. An informal term that has been used for these connectors is "bisexual", in addition to the more official terminology, mixed-gender. Male and female electrical connectors A panel-mounted IEC C14 male connector jack designed to accept AC line power A female VGA connector which serves as a jack A male DE-9 serial port connector which serves as a jack A null modem cable with a female connector on each end, both of which serve as plugs A male D-Subminiature connector which serves as a plug. Another closely related type is the stackable connector for electronics, which typically has male pins on one surface, and complementary female sockets on the opposite surface, allowing multiple units to be stacked up like plastic milk crates. When an enforced sense of unidirectionality or "one-way flow" is required for safety or other reasons for example, AC electrical power connections , a strict assignment of connector genders is implemented to prevent undesired configurations, and gender changers are banned.
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Examples of this include stackable banana plugs, and interconnect cables specified for the IEEE instrumentation bus. Stackable connectors are not classified as hermaphroditic in the strictest sense, but are often described as such in looser usage. Some military fiber optical cables also have hermaphroditic connectors to prevent "wrong gender" connector problems in field deployments. In this case the connector is designated a jack J ref des regardless of the contact gender because the housing for the contacts is in fact configured as the receptacle even though its mate the plug goes around the receptacle. Stackable mezzanine bus connectors are used on some modular microcomputer accessory boards for systems such as the Arduino add-on daughterboards called "shields". However, since one-way flow is implemented by forced-air fans or blowers, "backwards" gendered connections can be seen frequently in some systems, since all connections are typically sealed with duct sealing mastic or tape to prevent leakage anyway. In this example, the marginal reliability of the connector choice was deemed to be acceptable by the equipment designer, since the power adapter supplies low voltage that does not pose an electric shock hazard. Both terms mean the same thing but could be construed to be completely different items. True hermaphroditic connectors should not be confused with mixed gender connectors, which are described elsewhere in this article. However, a physical attempt to mate two USB "Type A" cables with each other reveals the fact that the connectors will not interconnect.