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 5855-00-494-9581
NSN 6620-00-068-2503
NSN 5998-01-373-3826
NSN 5975-01-380-4799
NSN 6320-01-220-2264
NSN 4140-00-880-5140
NSN 5905-01-392-1749
NSN 6685-01-376-3734
NSN 6130-00-372-4322
NSN 6320-01-328-6575
NSN 6610-00-245-6177
NSN 7035-01-593-8058