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 6110-01-373-4269
NSN 5960-01-075-2694
NSN 5965-00-147-3070
NSN 5999-00-513-7763
NSN 5905-01-543-5824
NSN 6150-00-198-7395
NSN 4140-00-587-7496
NSN 6105-01-606-4265
NSN 5905-00-775-5733
NSN 5855-01-417-3250
NSN 6145-00-418-2718
NSN 5945-00-835-2517