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 5950-01-419-5463
NSN 6320-01-412-2973
NSN 5915-00-636-9785
NSN 6610-00-614-7943
NSN 6610-01-112-4989
NSN 7035-01-008-7248
NSN 6620-01-168-8450
NSN 7035-00-523-7492
NSN 6240-01-418-2606
NSN 5935-01-330-1781
NSN 5998-01-005-0310
NSN 6135-01-597-7685