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 6650-00-181-8376
NSN 6685-01-467-8429
NSN 6320-00-270-8222
NSN 5855-01-306-1843
NSN 6135-01-041-3829
NSN 5935-00-270-4990
NSN 6650-01-236-4479
NSN 5998-00-247-1500
NSN 6610-00-051-0989
NSN 6620-01-118-7588
NSN 5910-01-215-1550
NSN 6620-01-304-4747