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 5915-01-356-7947
NSN 6220-00-643-4045
NSN 5915-01-051-5563
NSN 6130-00-240-0026
NSN 6240-01-133-9596
NSN 6240-01-573-3316
NSN 6645-01-280-5395
NSN 5996-01-015-9539
NSN 6650-00-197-7563
NSN 7035-01-121-0901
NSN 5855-01-571-1557
NSN 5935-01-308-0318