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 6130-00-199-4210
NSN 5990-01-478-5389
NSN 5960-00-354-3364
NSN 5905-01-419-3025
NSN 6610-01-537-1685
NSN 4140-01-538-9660
NSN 6110-01-179-3097
NSN 5960-00-068-0625
NSN 6130-01-068-3216
NSN 5895-01-462-1911
NSN 6135-01-096-1452
NSN 5996-01-425-1455