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 5915-01-237-4894
NSN 4140-01-609-4585
NSN 6135-01-140-8201
NSN 5999-01-548-7046
NSN 6610-01-131-9133
NSN 5960-01-032-4229
NSN 5998-01-622-5739
NSN 6150-00-387-3045
NSN 5945-01-415-0858
NSN 6135-00-295-2614
NSN 6240-01-367-1925
NSN 6240-00-518-3541