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 6135-00-266-9762
NSN 5920-00-256-9367
NSN 5996-00-061-0336
NSN 5998-00-455-9548
NSN 6105-00-062-8543
NSN 5920-01-457-5623
NSN 5945-00-576-0158
NSN 5925-00-016-3758
NSN 5996-01-215-2769
NSN 5998-00-911-7214
NSN 6145-00-081-5070
NSN 5905-00-910-4188