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 6650-01-445-8790
NSN 6240-01-097-4722
NSN 5895-01-654-7154
NSN 5835-01-422-7393
NSN 6220-00-837-2176
NSN 6645-01-171-3242
NSN 5925-01-078-6451
NSN 5990-01-296-8190
NSN 5935-01-303-9908
NSN 5855-00-185-1560
NSN 5930-01-579-4635
NSN 5935-01-316-3770