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 6220-01-408-1747
NSN 4140-00-420-0251
NSN 5990-01-359-8334
NSN 5910-00-147-0842
NSN 6145-01-345-6572
NSN 6610-01-450-3844
NSN 6320-01-325-3620
NSN 5998-01-026-0684
NSN 6620-00-891-8584
NSN 5930-00-102-2942
NSN 5950-01-038-6578
NSN 5895-01-363-3140