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 6650-01-224-2555
NSN 5985-01-285-4719
NSN 5925-00-477-2703
NSN 6685-00-887-3441
NSN 6320-00-681-1324
NSN 2925-01-357-9021
NSN 5999-00-647-4999
NSN 5935-01-051-7882
NSN 5960-00-236-3980
NSN 5835-01-123-8305
NSN 5960-01-530-6302
NSN 6320-01-086-2602