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 6620-01-412-3258
NSN 4140-00-862-5644
NSN 5895-00-847-8935
NSN 7035-01-442-3987
NSN 6610-01-229-3679
NSN 5855-01-040-3881
NSN 6610-01-398-2554
NSN 6620-01-390-1121
NSN 5990-00-488-1091
NSN 5950-00-144-4139
NSN 5915-01-574-5939
NSN 4140-01-356-7967