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 5835-00-461-9984
NSN 6145-01-373-5059
NSN 6105-01-180-7066
NSN 5915-01-170-9888
NSN 6620-01-210-4401
NSN 5998-00-243-7459
NSN 5975-00-189-0857
NSN 7035-01-572-5620
NSN 5975-00-246-4906
NSN 5975-00-686-3504
NSN 5999-01-116-2638
NSN 6145-01-235-6192