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 5905-01-060-3615
NSN 5925-00-038-6147
NSN 5990-00-052-9839
NSN 6650-00-121-4416
NSN 5975-00-443-4936
NSN 6145-01-439-2225
NSN 6620-01-544-1083
NSN 6105-01-509-2872
NSN 5996-00-963-1352
NSN 6320-01-173-7950
NSN 6105-00-783-6962
NSN 6110-01-625-6100