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 5920-00-112-4341
NSN 5945-01-499-7228
NSN 6110-00-991-0859
NSN 7035-01-261-9850
NSN 5835-01-332-2867
NSN 6220-00-823-6688
NSN 5975-01-427-3521
NSN 5855-01-079-8716
NSN 5935-01-634-0668
NSN 5996-01-370-9886
NSN 5950-00-271-1611
NSN 6650-01-581-5765