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 5910-01-542-8835
NSN 5855-01-632-9112
NSN 5960-01-252-4153
NSN 6320-01-461-5866
NSN 4140-01-092-0807
NSN 6110-00-181-9544
NSN 5895-01-415-6326
NSN 6645-01-014-2849
NSN 5835-01-123-8305
NSN 5996-01-238-1041
NSN 5965-01-552-4272
NSN 6110-00-594-7640