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 5925-01-475-1832
NSN 5999-01-545-0783
NSN 5930-01-400-6126
NSN 5960-01-543-0235
NSN 6620-01-280-3516
NSN 5996-00-161-4202
NSN 6645-00-715-1531
NSN 6610-00-872-7600
NSN 5960-01-484-7966
NSN 5975-01-340-5774
NSN 6105-01-592-5969
NSN 6150-00-314-0728