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 6110-01-359-1751
NSN 6645-00-106-0140
NSN 5935-01-456-0118
NSN 6105-00-413-8097
NSN 5930-01-607-0020
NSN 5945-01-134-3941
NSN 5985-01-524-7236
NSN 5925-01-010-7593
NSN 5930-01-230-0721
NSN 6150-01-143-5757
NSN 4140-01-421-9162
NSN 6320-00-456-0836