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 6150-01-614-1750
NSN 5960-01-466-0768
NSN 6610-01-152-2821
NSN 6220-01-432-2831
NSN 5999-01-394-7173
NSN 4140-00-886-1710
NSN 6650-01-360-9691
NSN 5925-00-111-0452
NSN 6105-01-218-7793
NSN 5855-00-631-4565
NSN 6320-01-462-3555
NSN 5950-01-455-8226