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 6320-00-270-8222
NSN 2925-01-462-1620
NSN 4140-00-781-5700
NSN 2925-01-239-6044
NSN 6685-01-488-4742
NSN 5990-01-633-9503
NSN 6110-01-455-4453
NSN 5999-01-183-2184
NSN 2925-00-759-5465
NSN 5945-01-579-6583
NSN 6130-01-431-2489
NSN 5950-01-318-4054