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 6650-00-561-1359
NSN 5895-01-502-8948
NSN 6105-01-573-6400
NSN 4140-00-872-3363
NSN 7035-01-579-7228
NSN 5998-01-628-6627
NSN 5905-01-116-5406
NSN 5910-00-465-1399
NSN 2925-01-429-2235
NSN 5950-01-470-1866
NSN 5996-01-163-1768
NSN 6220-00-353-0942