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 5999-01-448-4216
NSN 6610-00-553-5103
NSN 6220-00-004-5356
NSN 6220-01-202-7279
NSN 5985-00-813-3056
NSN 6320-01-359-3921
NSN 5920-01-562-4779
NSN 5960-01-089-8155
NSN 6620-01-495-3536
NSN 6105-01-229-3760
NSN 6320-00-994-0179
NSN 6610-00-451-3325