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 6620-00-064-3598
NSN 5975-00-212-7754
NSN 5905-01-007-5621
NSN 5975-01-059-2705
NSN 5930-00-823-6123
NSN 5935-01-645-2212
NSN 4140-00-994-7145
NSN 5930-01-558-1924
NSN 5990-01-544-0364
NSN 5998-01-139-1045
NSN 5950-01-510-8420
NSN 6105-00-243-9278