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 6105-00-370-1365
NSN 5945-00-234-4293
NSN 5999-00-101-2284
NSN 5915-01-442-8469
NSN 5998-01-186-3932
NSN 5935-01-230-4533
NSN 5920-00-130-3593
NSN 5999-00-543-7347
NSN 6105-01-420-4818
NSN 6240-01-437-6756
NSN 5925-01-535-4409
NSN 6145-00-016-8768