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Phrase Definition
Jackscrew A connector accessory (one or two per connector) used to draw mating connectors together and to separate them. Includes a threaded screw on one connector which screws into the threads on the mating connector.
Jumper A metal bridge that closes an electrical circuit. Typically, a jumper consists of a plastic plug that fits over a pair of protruding pins, like CA's 2-pin shorting jumper (02SJO-A).