A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 6320-01-481-7322
NSN 6135-00-050-7189
NSN 5975-00-198-8763
NSN 6150-00-968-3700
NSN 5965-00-958-7455
NSN 5915-01-386-9578
NSN 6650-00-163-3077
NSN 6685-01-279-6300
NSN 6240-01-096-1907
NSN 6130-01-043-6786
NSN 4140-01-355-8578
NSN 5965-01-029-5222