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 4140-00-704-7615
NSN 6685-00-226-3554
NSN 5945-01-558-2240
NSN 5990-01-149-9228
NSN 5895-01-607-6705
NSN 6220-00-296-4101
NSN 6620-01-643-6817
NSN 6150-01-091-0660
NSN 6150-00-081-2063
NSN 6650-00-061-2232
NSN 5915-00-059-5629
NSN 5905-00-102-6066