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 5996-01-534-7302
NSN 6645-01-007-9192
NSN 6645-01-188-5237
NSN 5945-00-832-4128
NSN 5960-01-495-0859
NSN 4140-00-099-9205
NSN 6645-00-872-4784
NSN 5905-00-827-9488
NSN 2925-01-225-0713
NSN 5990-01-362-5373
NSN 6620-01-211-4098
NSN 6110-01-361-1837