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 5960-01-278-2852
NSN 5996-01-279-9841
NSN 5999-00-063-5786
NSN 5990-01-357-6175
NSN 5910-00-067-6269
NSN 5945-00-726-2420
NSN 2925-01-618-5706
NSN 5930-00-561-7847
NSN 6150-01-422-3544
NSN 5999-01-312-7977
NSN 6685-01-062-2151
NSN 6320-01-160-0416