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 6240-01-534-5829
NSN 5990-01-013-8464
NSN 6685-01-600-0433
NSN 6105-01-640-8017
NSN 5895-00-227-1002
NSN 5945-01-382-8711
NSN 5835-01-520-4479
NSN 5990-01-568-5565
NSN 5855-01-385-6586
NSN 6240-01-564-1775
NSN 5960-01-418-2641
NSN 5965-01-003-2641