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 6620-01-549-6653
NSN 5975-01-533-5555
NSN 5855-01-107-5925
NSN 5985-01-616-9647
NSN 5935-01-543-7037
NSN 7035-00-890-7649
NSN 6240-00-695-1032
NSN 6150-00-894-6804
NSN 5910-01-541-3718
NSN 7035-01-592-7756
NSN 5895-01-431-9236
NSN 5960-00-170-6916