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 5945-01-060-0017
NSN 5925-01-054-3783
NSN 4140-01-123-9149
NSN 5950-00-639-9675
NSN 7035-01-347-6110
NSN 7035-00-523-7492
NSN 6320-00-593-0379
NSN 6135-01-255-9129
NSN 5998-01-408-6921
NSN 5835-01-583-8358
NSN 5998-00-661-0380
NSN 6150-00-467-0803