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 5950-01-049-2878
NSN 5935-01-163-6510
NSN 5910-00-230-5114
NSN 5985-00-420-1260
NSN 5920-01-234-2368
NSN 5960-01-641-5493
NSN 5895-00-897-1204
NSN 6110-01-348-2223
NSN 4140-01-007-8902
NSN 5960-00-553-7338
NSN 5999-00-040-0551
NSN 6105-01-269-7117