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 4140-01-411-7445
NSN 5996-01-195-4122
NSN 5945-01-506-3707
NSN 5965-00-296-9994
NSN 5950-01-241-7825
NSN 5935-00-198-2568
NSN 6220-01-464-3618
NSN 5905-01-044-4858
NSN 5960-01-495-0859
NSN 6105-01-377-2198
NSN 5920-00-107-2798
NSN 5910-01-027-1290