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 6150-01-009-6420
NSN 5985-01-158-4468
NSN 6110-01-253-5306
NSN 5835-01-519-2916
NSN 5950-01-178-8241
NSN 2925-01-055-7607
NSN 5990-00-935-5610
NSN 5996-01-429-5712
NSN 6110-01-485-3312
NSN 6320-01-246-4390
NSN 5950-01-133-4536
NSN 5998-01-330-2563