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 5945-01-267-3960
NSN 5999-00-708-8815
NSN 6145-01-417-9630
NSN 5950-01-147-8095
NSN 5965-00-617-5731
NSN 6145-01-248-6284
NSN 5930-00-964-2789
NSN 6135-00-461-3590
NSN 6320-01-227-2648
NSN 6240-01-474-5446
NSN 5930-00-741-2642
NSN 6130-00-670-7758