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 5905-01-655-7737
NSN 5895-01-634-0630
NSN 2925-01-076-5219
NSN 5945-00-736-4490
NSN 6220-01-567-4386
NSN 5925-01-445-5967
NSN 5835-01-597-4820
NSN 5990-00-518-0684
NSN 5935-01-100-1171
NSN 5996-01-365-8034
NSN 5835-01-209-6410
NSN 6130-01-350-0331