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 5996-01-353-4658
NSN 2925-01-627-6568
NSN 5999-01-634-0576
NSN 2925-00-246-3077
NSN 6610-01-376-9199
NSN 5990-00-946-4545
NSN 6105-01-548-8436
NSN 6240-01-556-0650
NSN 5835-01-235-0391
NSN 5910-00-564-2473
NSN 6130-01-293-2150
NSN 5950-00-079-3491