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 5945-01-237-2592
NSN 5960-01-434-5539
NSN 4140-01-463-8749
NSN 6685-01-110-7745
NSN 6620-01-654-5719
NSN 5855-01-389-3091
NSN 5915-00-341-6505
NSN 5965-00-961-1627
NSN 5930-01-571-4635
NSN 5990-00-775-2637
NSN 5915-01-322-8226
NSN 5999-00-492-8926