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 6610-01-471-8130
NSN 6620-01-454-8926
NSN 6105-00-825-2684
NSN 6150-01-026-7983
NSN 5935-01-602-8366
NSN 5996-01-080-7943
NSN 5985-00-628-4647
NSN 5965-01-643-4959
NSN 7035-00-225-6499
NSN 5895-01-373-1560
NSN 4140-01-475-2350
NSN 6240-01-370-2518