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 5855-01-212-6612
NSN 5935-00-225-9302
NSN 5930-00-065-5712
NSN 4140-01-522-8245
NSN 6220-00-799-2210
NSN 6220-01-451-3056
NSN 5960-01-249-7617
NSN 6130-01-262-4366
NSN 5990-00-060-7009
NSN 6150-01-400-4211
NSN 5996-00-248-7061
NSN 6620-00-111-0401