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 5905-01-448-0448
NSN 6135-00-175-7132
NSN 4140-01-115-7377
NSN 6685-01-575-9039
NSN 6610-01-345-1110
NSN 5950-01-347-7324
NSN 5950-00-362-5661
NSN 6105-01-654-3555
NSN 5950-01-083-5042
NSN 5950-00-591-9355
NSN 5950-01-617-3872
NSN 5950-01-649-1289