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 5950-01-357-1089
NSN 6130-01-386-2005
NSN 5835-00-170-5238
NSN 6320-00-809-5744
NSN 5945-01-323-4937
NSN 6105-01-536-2482
NSN 6150-00-964-4054
NSN 5998-00-835-3147
NSN 6135-01-456-7541
NSN 5945-01-233-4746
NSN 6220-01-162-7954
NSN 5998-01-496-7673