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 5855-01-224-7975
NSN 5945-00-081-2754
NSN 7035-00-549-2722
NSN 5965-00-015-7408
NSN 5835-01-241-1090
NSN 6105-01-105-8332
NSN 6110-01-209-9136
NSN 5999-00-419-3877
NSN 5975-01-057-9618
NSN 5990-00-978-4936
NSN 6145-01-246-7506
NSN 5910-01-270-8660