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 4140-01-094-4571
NSN 5915-01-330-9242
NSN 5965-01-419-8200
NSN 4140-01-198-8641
NSN 5996-01-117-4894
NSN 6620-01-387-7645
NSN 5996-00-802-7822
NSN 6130-00-642-4264
NSN 2925-01-458-5808
NSN 5996-01-432-1145
NSN 5950-00-559-0128
NSN 5935-00-157-3922