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 6620-01-586-7242
NSN 5996-00-358-1899
NSN 6135-01-091-4223
NSN 5996-01-230-4157
NSN 6130-00-812-6175
NSN 6135-01-230-4399
NSN 4140-01-165-6409
NSN 6145-01-410-7153
NSN 5975-01-229-1874
NSN 5930-00-151-9286
NSN 6685-01-634-0611
NSN 6320-01-262-8642