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 6150-01-583-5724
NSN 5945-01-334-6016
NSN 5945-01-268-4050
NSN 6610-01-443-4055
NSN 6240-01-594-5703
NSN 6135-00-738-5571
NSN 6220-01-104-5075
NSN 6240-01-557-0647
NSN 5835-01-378-6804
NSN 6240-01-617-8254
NSN 6320-01-170-4068
NSN 5925-00-347-0566