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 6150-00-869-8156
NSN 6150-01-503-0272
NSN 5999-01-430-9558
NSN 4140-00-218-3579
NSN 5990-01-269-2111
NSN 6105-00-893-6470
NSN 6130-00-233-7639
NSN 5999-01-319-8445
NSN 5998-00-199-9861
NSN 6650-01-569-8224
NSN 5999-01-245-2310
NSN 6145-00-583-9989