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 5915-01-417-6979
NSN 6220-01-248-8734
NSN 6650-01-369-1650
NSN 5855-01-178-6396
NSN 6150-01-174-8035
NSN 6685-01-432-1849
NSN 4140-01-576-9796
NSN 5855-00-782-7714
NSN 5985-01-051-4177
NSN 5945-01-488-5602
NSN 5985-01-003-7315
NSN 5990-01-202-7003