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 6320-00-194-4252
NSN 5960-01-605-9921
NSN 5920-01-423-5078
NSN 5985-01-102-1576
NSN 5960-00-486-0323
NSN 5930-01-147-9657
NSN 6110-01-340-0127
NSN 5998-01-322-3806
NSN 5895-00-113-5671
NSN 6620-01-349-4469
NSN 6320-01-516-3836
NSN 5835-01-104-5707