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 4140-00-140-7587
NSN 5925-01-342-8348
NSN 5965-01-450-2187
NSN 6150-01-333-3324
NSN 6105-00-104-6289
NSN 6620-01-145-1278
NSN 5910-01-410-6759
NSN 6150-00-840-9424
NSN 5930-00-859-1831
NSN 6240-01-607-4413
NSN 5945-01-337-2007
NSN 5925-00-439-0797