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 6610-00-732-2488
NSN 5999-00-019-2962
NSN 5965-01-063-7894
NSN 6150-01-559-2431
NSN 7035-01-398-9581
NSN 6240-00-243-8336
NSN 6620-00-854-5024
NSN 6130-00-862-2648
NSN 5910-01-393-4764
NSN 5965-01-061-6871
NSN 6240-01-502-7103
NSN 6240-01-572-2225