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 6685-01-181-6142
NSN 5965-01-130-1965
NSN 2925-01-340-3411
NSN 2925-01-372-9455
NSN 5945-00-790-2333
NSN 5960-01-233-2756
NSN 5905-01-443-9539
NSN 6610-01-611-5323
NSN 6650-01-632-1574
NSN 6130-01-038-0806
NSN 6685-01-054-3166
NSN 6105-01-148-1131