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 5905-01-573-9570
NSN 5855-01-659-8769
NSN 5835-01-615-8864
NSN 5945-01-534-2447
NSN 5920-01-415-5805
NSN 5835-01-104-1299
NSN 6105-01-513-9330
NSN 5935-01-176-7259
NSN 6220-01-154-0204
NSN 5960-01-423-1085
NSN 5996-01-452-4386
NSN 5985-01-317-2916