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 5920-01-159-7949
NSN 6150-01-134-2029
NSN 5998-01-576-6775
NSN 6105-01-295-5307
NSN 6220-01-089-3539
NSN 6130-00-902-5692
NSN 5945-00-926-6295
NSN 6610-01-399-5222
NSN 5835-00-422-1441
NSN 5945-01-623-5308
NSN 6105-00-500-9606
NSN 7035-00-238-3662