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 5965-00-234-7338
NSN 5999-01-355-1444
NSN 5996-01-372-1187
NSN 4140-00-609-9258
NSN 5945-00-848-2576
NSN 6610-01-528-5750
NSN 6220-01-581-4801
NSN 5935-01-420-1014
NSN 5999-01-408-9487
NSN 6135-01-096-1452
NSN 6320-01-029-4220
NSN 6650-01-301-3959