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 6135-01-551-0562
NSN 6650-01-616-4344
NSN 5975-00-300-5664
NSN 5895-00-757-9250
NSN 5998-01-371-1789
NSN 5965-01-269-9521
NSN 5835-01-485-0210
NSN 5998-01-151-1169
NSN 5930-00-306-4181
NSN 2925-01-015-9170
NSN 5910-00-851-7507
NSN 5975-01-069-6489