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 5999-01-166-0255
NSN 6620-01-352-5640
NSN 5920-01-422-9616
NSN 6105-00-491-1180
NSN 6645-00-935-7046
NSN 5985-01-088-2542
NSN 5905-01-519-2075
NSN 6110-01-224-7910
NSN 5835-01-390-0880
NSN 6645-01-357-7750
NSN 5915-00-170-4209
NSN 5985-01-386-6490