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 5925-01-501-8667
NSN 5895-00-872-1648
NSN 5925-00-923-4268
NSN 5965-01-428-3348
NSN 6220-00-863-0134
NSN 5920-01-206-0191
NSN 5945-01-228-6845
NSN 5975-01-231-9669
NSN 5998-01-318-6974
NSN 5930-01-540-9731
NSN 6320-01-512-2031
NSN 5925-01-516-2823