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 6610-01-099-6186
NSN 5910-01-069-8301
NSN 5945-01-456-4449
NSN 5930-00-533-3967
NSN 4140-00-246-4969
NSN 5950-00-666-1887
NSN 5935-00-682-3878
NSN 5998-01-192-4162
NSN 6610-01-351-4607
NSN 5985-01-255-3176
NSN 5910-01-593-6347
NSN 6145-00-999-5303