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 6240-01-447-8088
NSN 5835-01-201-1000
NSN 4140-01-025-1555
NSN 5910-00-890-9300
NSN 6610-01-127-0724
NSN 5990-00-446-0518
NSN 6220-01-365-1847
NSN 5990-01-154-7296
NSN 6110-01-065-9659
NSN 6150-01-289-2721
NSN 7035-01-295-1609
NSN 6130-00-156-7751