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 5996-00-181-0207
NSN 5855-00-688-9954
NSN 6130-01-621-2123
NSN 2925-01-633-4048
NSN 6220-01-383-6178
NSN 5935-01-516-6118
NSN 5950-00-199-4137
NSN 6220-01-469-6731
NSN 6240-01-463-3132
NSN 5930-01-444-4074
NSN 5965-00-506-9817
NSN 5935-01-624-0686