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 6645-01-188-5237
NSN 4140-00-942-7159
NSN 5960-00-432-8989
NSN 5999-01-487-6205
NSN 5915-01-394-6438
NSN 6105-01-454-2948
NSN 5905-01-524-1193
NSN 5935-01-363-6154
NSN 5960-01-589-6846
NSN 7035-00-163-6221
NSN 6110-00-059-7028
NSN 5960-01-599-9821