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 2925-01-553-0181
NSN 6150-00-946-8190
NSN 6110-00-950-6065
NSN 6240-01-395-6360
NSN 5999-00-280-3499
NSN 6130-01-535-3748
NSN 5835-00-823-6116
NSN 5930-00-388-6758
NSN 5998-01-422-2961
NSN 5915-00-324-4874
NSN 2925-01-607-4340
NSN 6685-01-658-8137