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 5990-01-016-4194
NSN 4140-01-381-0099
NSN 5998-00-808-5574
NSN 4140-01-541-9142
NSN 6685-01-357-6358
NSN 5935-00-134-5747
NSN 5835-01-519-3834
NSN 5930-01-089-7152
NSN 5975-01-571-5162
NSN 5996-01-393-0201
NSN 7035-01-599-7560
NSN 2925-00-041-0439