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 5990-01-145-2878
NSN 5950-01-276-2009
NSN 5915-00-144-5548
NSN 6650-01-549-1110
NSN 5935-01-228-4389
NSN 6150-00-536-0274
NSN 2925-01-255-6394
NSN 5905-01-468-6774
NSN 6220-00-227-0528
NSN 5996-01-479-6106
NSN 5996-00-277-7384
NSN 6650-01-264-2231