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 6645-00-679-8203
NSN 5905-01-461-2618
NSN 5855-01-418-2962
NSN 6650-01-294-5243
NSN 6150-01-582-4633
NSN 6220-00-542-4898
NSN 6150-01-478-9384
NSN 5998-00-157-4009
NSN 6240-01-644-2912
NSN 4140-01-039-9874
NSN 5935-01-444-1184
NSN 6130-00-827-4518