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 5999-00-199-5285
NSN 6320-01-458-1853
NSN 6150-00-130-2657
NSN 5960-00-833-7438
NSN 5835-00-467-7294
NSN 6105-00-069-6009
NSN 5960-01-433-7565
NSN 6130-00-243-5284
NSN 6145-01-329-3685
NSN 5996-01-219-6675
NSN 5930-01-497-9397
NSN 5950-00-061-7504