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 5990-00-849-6358
NSN 5835-01-641-0073
NSN 6320-01-425-1417
NSN 5998-01-534-8397
NSN 6220-01-364-8666
NSN 5999-00-189-1716
NSN 4140-00-170-5152
NSN 4140-01-512-8528
NSN 5930-01-537-1167
NSN 5999-01-563-4826
NSN 5945-00-230-2176
NSN 6240-00-624-1752