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 6105-00-297-3762
NSN 6610-00-912-6374
NSN 5910-01-475-1631
NSN 6320-01-627-8295
NSN 6650-01-440-2617
NSN 6650-01-132-0737
NSN 7035-00-238-3662
NSN 6150-00-752-2542
NSN 5910-01-431-8408
NSN 6320-01-089-9086
NSN 6650-01-152-9425
NSN 6105-01-388-4514