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 6320-01-466-4175
NSN 6610-00-107-1944
NSN 6135-00-583-3966
NSN 4140-01-605-1706
NSN 5895-01-599-2680
NSN 5945-00-581-9875
NSN 5985-01-504-4715
NSN 6240-01-478-3332
NSN 5990-00-698-3963
NSN 6110-01-313-7147
NSN 2925-00-005-1618
NSN 5990-01-156-8862