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 5975-01-326-3006
NSN 6110-00-407-6829
NSN 4140-00-200-0970
NSN 6220-01-634-0660
NSN 6130-01-210-1029
NSN 6110-01-242-5757
NSN 6645-00-103-2517
NSN 6610-01-544-6551
NSN 5915-01-268-0930
NSN 5855-01-047-9267
NSN 6320-00-593-0379
NSN 6130-01-600-0031