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 5960-01-406-4136
NSN 5835-01-468-6170
NSN 6130-01-429-5698
NSN 5960-01-282-2386
NSN 5998-00-019-4092
NSN 6105-01-274-8865
NSN 6620-01-271-4630
NSN 5990-01-510-4699
NSN 7035-01-232-7263
NSN 6620-01-110-2754
NSN 6650-01-254-0491
NSN 6105-00-948-0296