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 5910-01-085-9931
NSN 5950-00-266-9058
NSN 5990-01-109-5295
NSN 5960-01-425-1454
NSN 5985-01-628-7249
NSN 5905-00-960-6807
NSN 6130-00-959-5800
NSN 5835-01-123-8305
NSN 6105-01-333-6077
NSN 6135-00-231-7257
NSN 6105-01-609-1144
NSN 5835-01-379-1407