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 6650-01-466-2704
NSN 5920-01-437-7513
NSN 5945-01-341-9424
NSN 5920-00-175-7987
NSN 5925-01-446-9296
NSN 6135-00-057-2005
NSN 5998-00-497-6984
NSN 5895-00-222-8555
NSN 6685-01-193-2110
NSN 6620-01-420-6831
NSN 5998-01-425-2820
NSN 5905-01-303-6236