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 5855-01-388-2424
NSN 5920-01-316-1710
NSN 5950-01-386-4442
NSN 5835-01-170-5537
NSN 6135-01-579-8864
NSN 5999-00-192-4681
NSN 6610-00-270-9974
NSN 5925-00-917-9439
NSN 6145-00-366-5790
NSN 6620-01-461-3550
NSN 6620-01-323-7620
NSN 6130-01-064-0945