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 5895-01-098-9141
NSN 2925-01-348-3206
NSN 5960-01-494-7960
NSN 6145-01-542-0913
NSN 6320-01-329-2297
NSN 5998-01-367-4228
NSN 5855-00-782-7714
NSN 6620-01-250-7445
NSN 5835-01-522-9881
NSN 5960-00-165-1015
NSN 5945-00-515-2667
NSN 5935-01-522-1872