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 5920-01-233-4244
NSN 6320-01-227-2648
NSN 6150-01-132-7828
NSN 6320-00-270-8222
NSN 5920-00-990-3116
NSN 5905-00-781-1870
NSN 6130-00-903-3578
NSN 5996-01-479-9637
NSN 6685-01-274-8780
NSN 6130-01-295-7215
NSN 5998-00-238-6959
NSN 6645-01-556-5263