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 5910-01-500-9300
NSN 5905-01-341-9706
NSN 7035-01-551-2031
NSN 6650-01-428-9958
NSN 5965-01-406-6320
NSN 6320-00-480-7922
NSN 5998-01-602-9416
NSN 6240-01-264-2574
NSN 5920-01-258-6360
NSN 5990-01-654-6203
NSN 6320-01-089-9086
NSN 6110-01-633-9660