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 6620-01-091-9697
NSN 4140-01-559-6034
NSN 5965-01-328-9765
NSN 2925-01-311-7840
NSN 5925-00-083-6047
NSN 4140-01-312-1584
NSN 6650-01-374-4128
NSN 5990-01-003-4209
NSN 5998-00-707-3369
NSN 5960-00-431-3260
NSN 5835-00-912-5656
NSN 5930-01-378-7284