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 5895-01-395-0055
NSN 5895-01-611-3116
NSN 5920-00-144-8031
NSN 5925-01-634-0664
NSN 5935-01-306-5332
NSN 6320-01-278-9832
NSN 5996-01-391-2733
NSN 6145-01-223-0282
NSN 6220-01-329-3446
NSN 6110-01-028-6169
NSN 5930-01-661-3642
NSN 5905-00-065-8594