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 5960-01-605-9921
NSN 6645-01-633-1852
NSN 6650-01-062-3611
NSN 6145-01-599-9935
NSN 5960-01-573-6483
NSN 5895-01-371-2333
NSN 6135-00-932-3136
NSN 4140-01-055-9814
NSN 6650-01-115-7981
NSN 5950-01-463-3096
NSN 6220-01-340-7748
NSN 6610-00-170-6715