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 5990-01-003-4209
NSN 6145-00-158-8704
NSN 6145-01-043-8139
NSN 6240-01-295-5159
NSN 6240-01-383-8579
NSN 6620-01-112-2961
NSN 6220-00-447-3488
NSN 4140-01-409-1764
NSN 6240-01-376-5830
NSN 5905-00-260-5008
NSN 6620-01-542-0494
NSN 5920-00-976-3076