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 5999-00-687-1626
NSN 5960-01-454-7064
NSN 5855-01-378-1888
NSN 6320-01-353-9753
NSN 5965-00-400-6228
NSN 5998-01-587-1495
NSN 6135-01-054-2462
NSN 5930-01-227-1908
NSN 6650-00-994-1802
NSN 5950-00-419-5314
NSN 6240-01-502-7883
NSN 6650-01-267-6142