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  2. U.S. Military connector specifications - Wikipedia

    en.wikipedia.org/wiki/U.S._Military_connector...

    A MIL-DTL-38999 circular connector plated with a nickel–teflon composite. Left: plug (male) type connector; Right: receptacle (female) type connector) Electrical or fiber-optic connectors used by U.S. Department of Defense were originally developed in the 1930s for severe aeronautical and tactical service applications, and the Type "AN" series set the standard for modern military circular ...

  3. Electrical connector - Wikipedia

    en.wikipedia.org/wiki/Electrical_connector

    The connection may be removable (as for portable equipment), require a tool for assembly and removal, or serve as a permanent electrical joint between two points. [2] An adapter can be used to join dissimilar connectors. Most electrical connectors have a gender – i.e. the male component, called a plug, connects to the female component, or socket.

  4. Trailer connectors in North America - Wikipedia

    en.wikipedia.org/wiki/Trailer_connectors_in...

    4-pin round connector (Towing vehicle side) This connector is available in some cases instead of the flat 4-pin connector. It is less common on the U.S.-built vehicles, than 4-pin flat connector, but is still used in the older truck and SUV setups.

  5. AC power plugs and sockets - Wikipedia

    en.wikipedia.org/wiki/AC_power_plugs_and_sockets

    Chinese dual sockets have both an unearthed socket complying with figure 5 of GB 1002-2008 (both flat pin and 4.8 mm round pin), and an earthed socket complying with figure 4 of GB 1002-2008. The latter was removed from the 2021 revision of the Chinese standard, [ 7 ] but such dual sockets can still be found in many existing installations.

  6. Coaxial power connector - Wikipedia

    en.wikipedia.org/wiki/Coaxial_power_connector

    2.00 0.60 6.3 Nokia 2-mm DC Charging Interface Specification [3] 4.65–9.3 V Nokia DC-096 (0.48×2.1 mm on socket side) Nokia AC-3 charger Nokia 2-mm DC Charging Interface, used in Nokia phones and Bluetooth headphones 2.35 0.70 9.5 A EIAJ-01 0–3.15 V Kobiconn 3218-EX Lumberg 1636 01 Kobiconn 0307-EX (inline)

  7. Polarity symbols - Wikipedia

    en.wikipedia.org/wiki/Polarity_symbols

    The adapter typically supplies power to the device through a thin electrical cord which terminates in a coaxial power connector often referred to as a "barrel plug" (so-named because of its cylindrical shape). The polarity of the adapter cord and plug must match the polarity of the device, meaning that the positive contact of the plug must mate ...