Threaded coupling definitions

threaded coupling

an internally threaded cylinder for connecting two sections of rigid conduit
Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=442-02-29

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threaded coupling

a means of coupling by engaging screw threads present on the mating components
Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=581-07-19

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