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 6150-01-391-6854
NSN 6145-01-413-5516
NSN 5999-00-470-7849
NSN 5920-01-430-2530
NSN 5930-01-062-1560
NSN 6145-01-435-4416
NSN 5945-00-607-0674
NSN 6220-01-200-3410
NSN 5990-01-453-3552
NSN 6650-01-085-6088
NSN 6320-01-240-4637
NSN 5950-01-582-0174