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 5998-00-236-2028
NSN 5960-00-270-3324
NSN 5855-01-530-4147
NSN 6610-00-482-1081
NSN 5945-01-513-8305
NSN 5990-01-485-0260
NSN 5999-01-044-6250
NSN 6220-00-493-3188
NSN 5905-01-093-5709
NSN 5935-01-062-3692
NSN 5975-01-441-9221
NSN 2925-00-388-8932