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 5950-01-508-4244
NSN 7035-01-516-4411
NSN 5935-01-353-2395
NSN 5925-00-779-7307
NSN 5905-01-281-4121
NSN 5855-01-100-3272
NSN 6145-01-395-5904
NSN 6645-01-287-4356
NSN 5930-01-371-2822
NSN 5996-01-043-2105
NSN 6130-01-071-6927
NSN 6105-01-612-4063