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 6650-00-162-6638
NSN 5945-00-184-7983
NSN 5930-00-446-2013
NSN 6220-01-352-6132
NSN 5945-01-087-1961
NSN 5835-00-402-8387
NSN 6135-01-388-2761
NSN 6685-01-330-4313
NSN 6240-01-026-0032
NSN 5996-00-355-2563
NSN 5975-01-602-2535
NSN 5835-01-185-1102