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 5996-00-564-6472
NSN 5965-00-432-8528
NSN 5945-00-503-6746
NSN 4140-01-152-4199
NSN 5935-01-337-9019
NSN 5905-01-296-5317
NSN 6240-01-651-0489
NSN 6220-00-495-5116
NSN 6105-00-008-0214
NSN 6220-01-285-0199
NSN 5895-01-335-3277
NSN 6645-00-664-4665