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 5925-00-682-0742
NSN 5950-00-302-9472
NSN 6610-01-417-3011
NSN 6320-00-521-9350
NSN 5998-00-568-3973
NSN 5935-01-149-0159
NSN 6220-01-248-1927
NSN 6105-00-564-3606
NSN 6650-01-256-7038
NSN 5895-01-146-5382
NSN 5985-00-081-9142
NSN 6685-00-407-1028