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 5965-00-486-7907
NSN 5925-01-011-6551
NSN 5998-00-240-9943
NSN 6620-01-241-0538
NSN 5960-00-401-0794
NSN 5999-00-812-9253
NSN 6135-01-301-8776
NSN 5998-01-178-8333
NSN 5975-01-461-0921
NSN 4140-01-394-5304
NSN 2925-01-587-3956
NSN 4140-01-192-3570