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 5945-01-515-7814
NSN 4140-01-016-3143
NSN 5950-01-282-7982
NSN 6240-01-388-8407
NSN 6105-01-177-5691
NSN 5855-01-103-8650
NSN 6650-01-398-7323
NSN 5996-01-576-9852
NSN 5996-01-305-7039
NSN 6685-00-116-8073
NSN 5910-01-408-8098
NSN 6650-01-627-1480