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 5935-00-008-8686
NSN 5835-01-123-8305
NSN 5950-00-354-3316
NSN 6650-00-399-2005
NSN 6620-00-993-9564
NSN 6105-00-411-0306
NSN 6135-00-900-2139
NSN 4140-01-203-8713
NSN 6130-01-634-0603
NSN 6105-01-005-4825
NSN 4140-01-605-4196
NSN 4140-01-026-2304