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 5990-01-443-2931
NSN 6620-00-877-3266
NSN 6105-00-488-5423
NSN 5950-00-468-7991
NSN 4140-01-152-0648
NSN 6620-01-382-7392
NSN 6240-01-519-8781
NSN 6645-01-565-4770
NSN 5945-01-370-2739
NSN 5998-01-500-9398
NSN 5935-01-503-1544
NSN 5910-01-103-9534