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 6650-01-289-0524
NSN 6135-01-461-2915
NSN 5996-01-547-9155
NSN 6240-00-146-9322
NSN 5895-00-227-4752
NSN 5910-00-818-3389
NSN 6685-00-058-9526
NSN 5985-01-039-2317
NSN 6130-01-417-7131
NSN 5999-00-215-0182
NSN 5950-01-308-4082
NSN 6110-01-162-2436