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 5930-01-525-3973
NSN 5945-00-565-8452
NSN 6220-01-260-1097
NSN 5990-01-400-3299
NSN 5985-01-283-7130
NSN 6130-01-581-8485
NSN 6130-00-625-3744
NSN 5895-01-461-8287
NSN 6220-00-899-6718
NSN 5925-00-147-9946
NSN 5930-01-159-8081
NSN 5998-01-646-4186