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 5998-01-634-0604
NSN 5895-00-927-6041
NSN 5920-01-453-7523
NSN 6135-01-092-4734
NSN 6110-01-467-2882
NSN 7035-01-184-8905
NSN 5905-01-213-6100
NSN 5985-01-521-1775
NSN 5835-01-310-8979
NSN 6320-01-538-6737
NSN 5950-01-227-2466
NSN 6130-01-568-1685