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 7035-00-679-9027
NSN 6135-01-091-6021
NSN 6610-00-574-0156
NSN 6240-01-391-7490
NSN 5990-01-453-3552
NSN 5935-01-524-2492
NSN 5998-01-364-1951
NSN 5998-01-594-7203
NSN 6620-00-186-8220
NSN 5975-00-160-2407
NSN 6130-00-229-1620
NSN 6610-00-767-7686