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 6135-00-643-4843
NSN 4140-01-368-3539
NSN 5910-00-837-0971
NSN 5999-01-345-5688
NSN 6110-00-060-5391
NSN 5930-01-154-9646
NSN 7035-00-063-5245
NSN 5998-01-445-5601
NSN 5925-00-615-8777
NSN 5915-01-203-6118
NSN 6645-01-462-2101
NSN 5930-01-511-0278