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 5905-01-174-5377
NSN 6650-00-476-9450
NSN 5920-01-298-7989
NSN 6105-00-357-1801
NSN 5910-00-164-1575
NSN 5996-01-462-1631
NSN 6105-01-097-3882
NSN 5835-00-406-6382
NSN 5935-01-369-5692
NSN 5915-01-228-2458
NSN 5985-01-417-3184
NSN 6645-01-477-2532