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 6145-00-868-4677
NSN 5935-00-595-9262
NSN 5965-00-508-3270
NSN 6130-01-239-6642
NSN 6685-00-221-5750
NSN 5990-01-630-4308
NSN 5835-00-051-9092
NSN 6320-00-937-5625
NSN 6110-01-187-0603
NSN 5950-00-971-7503
NSN 6150-00-599-0721
NSN 5930-00-230-9402