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 5945-01-608-6173
NSN 6220-00-477-5946
NSN 5998-01-480-8979
NSN 5985-01-100-3471
NSN 5999-01-103-9501
NSN 5965-00-407-4828
NSN 5935-00-915-1227
NSN 5895-01-442-3685
NSN 5960-00-344-9588
NSN 5935-01-426-8969
NSN 4140-01-591-6772
NSN 5950-01-417-2423