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 5999-00-468-6531
NSN 5925-00-823-6138
NSN 5945-00-227-7030
NSN 5985-00-577-2920
NSN 5915-01-381-5267
NSN 5895-01-076-5871
NSN 6240-00-109-5768
NSN 5920-00-263-2192
NSN 4140-01-093-9728
NSN 5960-01-358-5469
NSN 5905-01-562-1225
NSN 5905-01-447-2806