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 6150-00-833-8148
NSN 5999-01-559-2104
NSN 5895-00-605-8696
NSN 6685-01-090-1119
NSN 5960-01-170-0234
NSN 5998-01-539-9056
NSN 6150-00-952-2766
NSN 5895-01-048-7886
NSN 6135-00-078-9931
NSN 5895-00-105-8588
NSN 5945-01-560-6562
NSN 6105-01-347-0070