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 5925-01-223-3729
NSN 4140-01-369-2959
NSN 5998-01-255-5566
NSN 6685-01-539-8970
NSN 5999-00-290-5898
NSN 5935-01-116-1869
NSN 4140-01-414-6325
NSN 6145-01-412-0926
NSN 6650-01-481-8009
NSN 5915-01-450-5877
NSN 6685-00-647-3883
NSN 5905-00-330-5618