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 6320-01-039-5891
NSN 5935-01-110-5569
NSN 5999-01-364-9003
NSN 4140-01-040-1700
NSN 5895-00-244-1838
NSN 6150-01-571-8029
NSN 5998-01-432-4257
NSN 6110-01-123-7285
NSN 6240-00-212-4305
NSN 6685-00-598-1746
NSN 6685-01-604-2863
NSN 6150-00-717-1596