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 6610-01-330-7839
NSN 6620-00-456-0404
NSN 5905-01-183-3818
NSN 5910-01-563-5350
NSN 6150-01-081-2706
NSN 5915-01-409-2926
NSN 6145-01-282-8255
NSN 5925-01-651-6310
NSN 5915-01-599-1266
NSN 5998-01-268-4694
NSN 6150-01-364-8688
NSN 6135-01-530-8136