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 5950-01-570-0426
NSN 5960-00-702-0430
NSN 5999-01-222-0112
NSN 5945-01-531-6307
NSN 6105-00-842-4300
NSN 5935-01-643-9449
NSN 5835-01-576-9013
NSN 6110-01-612-5854
NSN 5930-00-258-9997
NSN 5855-00-455-6070
NSN 6130-01-278-2987
NSN 5905-00-185-6237