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 5990-00-454-6250
NSN 5895-01-253-0777
NSN 7035-01-068-3300
NSN 5915-01-146-8951
NSN 5960-00-349-7650
NSN 5930-01-110-6971
NSN 6620-01-330-8802
NSN 6240-01-376-0306
NSN 6130-00-898-1874
NSN 6685-01-436-6635
NSN 6620-01-034-1697
NSN 6130-01-595-6760