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 5975-00-636-4910
NSN 5990-00-263-1289
NSN 7035-01-444-4240
NSN 5960-01-054-3752
NSN 5950-01-013-6042
NSN 5895-01-476-0831
NSN 5990-01-092-1963
NSN 6645-01-461-7704
NSN 6650-00-469-2218
NSN 5905-00-758-3415
NSN 6220-01-513-0060
NSN 6650-01-608-2240