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 4140-01-350-4475
NSN 2925-01-424-0235
NSN 5960-01-360-3639
NSN 6135-01-247-5660
NSN 5975-01-441-0659
NSN 5960-00-201-5265
NSN 5935-01-450-8585
NSN 6610-00-006-1489
NSN 6110-00-228-4308
NSN 6650-01-127-9518
NSN 5996-01-562-4780
NSN 6130-01-242-9778