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 5945-01-377-2415
NSN 6240-00-299-9819
NSN 6145-00-011-2390
NSN 5996-00-514-7678
NSN 6240-01-459-7827
NSN 6150-01-577-9802
NSN 5930-00-480-8079
NSN 5960-01-372-5609
NSN 5930-01-157-2793
NSN 5975-01-044-3379
NSN 6110-01-185-8013
NSN 6240-00-522-2306