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 5990-00-170-4239
NSN 5905-01-582-2469
NSN 6130-00-361-7114
NSN 6650-01-113-7563
NSN 6130-01-331-3055
NSN 5895-01-369-8475
NSN 6650-00-809-1817
NSN 6645-01-286-6854
NSN 5930-00-925-1891
NSN 5960-01-338-3412
NSN 5910-00-989-2614
NSN 6220-01-063-8238