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 5975-00-090-5274
NSN 5895-01-392-0872
NSN 5945-00-393-1191
NSN 5895-00-406-7671
NSN 5905-00-945-0451
NSN 5905-00-156-2982
NSN 6105-01-114-4452
NSN 5975-01-605-5714
NSN 5975-01-477-3092
NSN 5945-00-112-4577
NSN 5915-00-538-7707
NSN 5985-00-649-8318