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 6105-00-114-0966
NSN 5998-01-222-4216
NSN 5835-00-681-0005
NSN 6685-01-505-1790
NSN 6645-00-200-2322
NSN 6620-01-068-4498
NSN 5998-00-146-0039
NSN 6650-01-388-2538
NSN 5855-00-149-0766
NSN 5975-00-938-8835
NSN 5905-00-067-8596
NSN 5985-00-717-8877