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 5930-01-224-5795
NSN 5990-01-452-0911
NSN 5920-01-123-9854
NSN 5945-00-586-4653
NSN 5905-01-262-2480
NSN 5990-01-224-8052
NSN 6645-01-462-2101
NSN 6150-00-479-2976
NSN 6135-01-508-3784
NSN 6645-00-216-6126
NSN 6610-01-446-7635
NSN 6145-01-100-0732